/* ==========================================================================
   星空体育主站 · assets/site.css
   共享外壳：reset / 设计变量 / 中文排版 / 头部 / 页脚 / 通用组件
   ========================================================================== */

/* ---------- 1. Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,h5,h6,p,ul,ol,li,figure,figcaption,blockquote,dl,dt,dd{margin:0}
ul,ol{padding:0;list-style:none}
img,svg,video{display:block;max-width:100%;height:auto}
button,input,select,textarea{font:inherit;color:inherit;background:none;border:0}
button{cursor:pointer}
a{color:inherit;text-decoration:none}
table{border-collapse:collapse;width:100%}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px}

/* ---------- 2. 设计变量 ---------- */
:root{
  --ink-900:#0A1830;
  --ink-800:#14294B;
  --ink-700:#1E3660;
  --paper:#F4EDE1;
  --paper-2:#E8DECE;
  --brown:#1D1712;
  --orange:#FF7A1A;
  --red:#D9372B;
  --cyan:#7FD4D8;
  --gold:#D8A94B;
  --mint:#35E8A9;
  --mist:#93A6C4;

  --surface-dark:var(--ink-900);
  --surface-panel:var(--ink-800);
  --surface-paper:var(--paper);
  --text-on-dark:var(--paper);
  --text-on-paper:var(--brown);
  --text-soft:var(--mist);
  --accent:var(--orange);

  --font-display:"Noto Serif SC","Source Han Serif SC","Source Han Serif CN","Songti SC","STSong",Times,serif;
  --font-body:Inter,"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-mono:"JetBrains Mono","Roboto Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;

  --shell:min(1240px,calc(100% - 48px));
  --gap:clamp(18px,2.4vw,32px);
  --section-pad:clamp(60px,8vw,124px);
  --header-h:68px;

  --radius-sm:6px;
  --radius:12px;
  --radius-pill:999px;
  --cut:22px;
  --cut-panel:polygon(0 0,calc(100% - var(--cut)) 0,100% var(--cut),100% 100%,0 100%);
  --cut-frame:polygon(0 0,calc(100% - 26px) 0,100% 26px,100% 100%,26px 100%,0 calc(100% - 26px));

  --ease:cubic-bezier(.22,.61,.36,1);
  --shadow-panel:0 22px 44px -28px rgba(0,0,0,.85);
  --shadow-lift:0 30px 54px -30px rgba(0,0,0,.95);
}

/* ---------- 3. 基础排版 ---------- */
body{
  min-height:100vh;
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.75;
  letter-spacing:.01em;
  color:var(--text-on-dark);
  background-color:var(--ink-900);
  background-image:
    radial-gradient(circle at 84% 2%, rgba(63,110,180,.22), transparent 46%),
    radial-gradient(circle at 4% 58%, rgba(217,55,43,.10), transparent 44%);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

h1,h2,h3,h4,h5,h6,.display{font-family:var(--font-display);font-weight:800;line-height:1.2;letter-spacing:-.01em}
h1{font-weight:900;font-size:clamp(34px,5.2vw,60px);line-height:1.08;letter-spacing:-.02em}
h2{font-size:clamp(26px,3.4vw,38px);line-height:1.18}
h3{font-size:clamp(19px,2vw,23px)}
h4{font-size:17px}

p{max-width:38em}
strong{font-weight:700}

.display-1{font-size:clamp(38px,6.4vw,72px);line-height:1.05;letter-spacing:-.022em;font-weight:900}
.display-2{font-size:clamp(28px,3.8vw,44px);line-height:1.14;letter-spacing:-.016em}
.lede{font-size:clamp(17px,1.5vw,19.5px);line-height:1.75;color:var(--paper);max-width:36em}

.eyebrow{
  display:inline-flex;align-items:center;gap:9px;
  font-family:var(--font-mono);font-size:12px;font-weight:700;
  letter-spacing:.2em;text-transform:uppercase;color:var(--cyan);
}
.eyebrow::before{content:"";width:22px;height:2px;background:currentColor;flex:0 0 auto}

.section-num{
  font-family:var(--font-mono);font-size:13px;font-weight:700;
  letter-spacing:.14em;color:var(--cyan);
}

.num-display{
  display:inline-block;
  font-family:var(--font-mono);font-weight:700;
  font-size:clamp(32px,5vw,66px);line-height:1;
  letter-spacing:-.02em;color:var(--mint);
  font-variant-numeric:tabular-nums;
}

.muted{color:var(--text-soft);font-size:14px}

.tag{
  display:inline-flex;align-items:center;
  font-family:var(--font-mono);font-size:12px;font-weight:700;
  letter-spacing:.1em;padding:3px 10px;border-radius:var(--radius-pill);
  border:1px solid currentColor;white-space:nowrap;
}
.tag--gold{color:var(--gold)}
.tag--cyan{color:var(--cyan)}
.tag--red{color:var(--red)}
.tag--mint{color:var(--mint)}

/* ---------- 4. 布局容器与分区 ---------- */
.container,.header-inner,.footer-inner{
  width:var(--shell);
  margin-inline:auto;
}

.section{padding-block:var(--section-pad)}
.section--tight{padding-block:clamp(36px,5vw,64px)}
.section--paper{background:var(--paper);color:var(--text-on-paper)}
.section--ink{background:var(--ink-800);color:var(--text-on-dark)}

.section--paper .eyebrow,
.section--paper .section-num{color:var(--red)}
.section--paper .muted{color:#6F6355}

.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;gap:12px 28px;margin-bottom:clamp(24px,3vw,44px)}
.section-head__text{flex:1 1 320px}
.section-head h2{margin-top:12px}

.rule{height:1px;background:rgba(127,212,216,.28);border:0;margin:clamp(28px,4vw,52px) 0}

/* ---------- 5. 通用组件 ---------- */
.grid{display:grid;gap:var(--gap)}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}

.panel{
  background:var(--ink-800);
  color:var(--text-on-dark);
  padding:clamp(20px,2.6vw,32px);
  border-radius:var(--radius);
  box-shadow:var(--shadow-panel);
}
.panel--flat{background:transparent;box-shadow:none;padding:0}

.cut-panel{
  background:var(--ink-800);
  color:var(--text-on-dark);
  padding:clamp(22px,2.8vw,36px);
  clip-path:var(--cut-panel);
  box-shadow:var(--shadow-panel);
  transition:transform .28s var(--ease),box-shadow .28s var(--ease);
}
.cut-panel:hover{transform:translateY(-4px);box-shadow:var(--shadow-lift)}
.cut-panel--paper{background:var(--paper);color:var(--text-on-paper)}

.media-frame{
  position:relative;
  display:block;
  overflow:hidden;
  aspect-ratio:16/9;
  background:var(--ink-800);
  clip-path:var(--cut-frame);
}
.media-frame > img{width:100%;height:100%;object-fit:cover}
.media-frame--wide{aspect-ratio:21/9}
.media-frame--tall{aspect-ratio:4/5}
.media-frame--square{aspect-ratio:1/1}
.media-frame__ph{
  position:absolute;inset:0;
  display:flex;align-items:center;justify-content:center;
  background:
    radial-gradient(circle at 74% 20%, rgba(255,122,26,.24), transparent 52%),
    radial-gradient(circle at 20% 80%, rgba(127,212,216,.22), transparent 56%),
    linear-gradient(158deg,var(--ink-800),var(--ink-900));
  color:var(--mist);
  font-family:var(--font-mono);font-size:12px;
  letter-spacing:.18em;text-transform:uppercase;text-align:center;padding:16px;
}
.media-caption{margin-top:10px;font-size:13px;line-height:1.6;color:var(--text-soft);max-width:34em}
.section--paper .media-caption{color:#6F6355}

.breadcrumb{font-size:13px;line-height:1.6}
.breadcrumb-list{display:flex;flex-wrap:wrap;align-items:center}
.breadcrumb-item{display:flex;align-items:center;color:var(--text-soft)}
.breadcrumb-item + .breadcrumb-item::before{content:"／";margin:0 10px;color:rgba(147,166,196,.45)}
.breadcrumb-link{color:var(--text-soft);border-bottom:1px solid transparent;transition:color .18s var(--ease),border-color .18s var(--ease)}
.breadcrumb-link:hover{color:var(--paper);border-bottom-color:var(--cyan)}
.section--paper .breadcrumb-item,
.section--paper .breadcrumb-link{color:#6F6355}

.prose{max-width:640px;font-size:16.5px;line-height:1.85}
.prose > * + *{margin-top:1em}
.prose h3{margin-top:1.8em}
.section--paper .prose{color:var(--brown)}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-family:var(--font-body);font-weight:700;font-size:14.5px;line-height:1;
  padding:12px 20px;border-radius:var(--radius-pill);
  border:1px solid transparent;white-space:nowrap;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),background-color .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease);
}
.btn--cta{background:var(--orange);color:#21160C;box-shadow:0 10px 24px -14px rgba(255,122,26,.95)}
.btn--cta:hover{transform:translateY(-2px);box-shadow:0 16px 30px -14px rgba(255,122,26,1)}
.btn--ghost{border-color:rgba(127,212,216,.4);color:var(--paper)}
.btn--ghost:hover{border-color:var(--cyan);background:rgba(127,212,216,.12);transform:translateY(-2px)}
.btn--paper{background:var(--paper);color:var(--brown)}
.btn--paper:hover{transform:translateY(-2px)}

.visually-hidden{
  position:absolute;width:1px;height:1px;margin:-1px;padding:0;
  overflow:hidden;clip:rect(0 0 0 0);clip-path:inset(50%);
  white-space:nowrap;border:0;
}

/* ---------- 6. 头部 ---------- */
.skip-link{
  position:absolute;left:16px;top:-72px;z-index:140;
  display:inline-flex;align-items:center;
  padding:10px 18px;border-radius:var(--radius-pill);
  background:var(--paper);color:var(--brown);
  font-size:14px;font-weight:700;
  box-shadow:0 12px 26px -14px rgba(0,0,0,.9);
  transition:top .2s var(--ease);
}
.skip-link:focus{top:14px}

.site-header{
  position:sticky;top:0;z-index:100;
  padding:14px 0;
  transition:padding .26s var(--ease);
}
.site-header::before{
  content:"";position:absolute;inset:0;z-index:-1;
  background:linear-gradient(180deg,rgba(10,24,48,.95),rgba(10,24,48,.74));
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  border-bottom:1px solid rgba(127,212,216,.14);
}
.site-header.is-condensed{padding:6px 0}
.site-header.is-condensed .nav-link{padding:6px 12px;font-size:13.5px}

.header-inner{
  display:flex;align-items:center;gap:clamp(12px,2vw,26px);
  min-height:52px;
  position:relative;
  transition:min-height .26s var(--ease);
}
.site-header.is-condensed .header-inner{min-height:44px}

.brand{
  display:inline-flex;align-items:center;gap:10px;
  flex:0 0 auto;padding:4px 2px;
}
.brand-name{
  font-family:var(--font-display);font-weight:900;
  font-size:clamp(16px,1.55vw,20px);letter-spacing:.02em;line-height:1.2;
}
.brand-pulse{
  flex:0 0 auto;
  width:10px;height:10px;border-radius:50%;
  background:var(--orange);
  animation:pulse 3.2s var(--ease) infinite;
}
@keyframes pulse{
  0%{box-shadow:0 0 0 0 rgba(255,122,26,.62)}
  55%{box-shadow:0 0 0 12px rgba(255,122,26,0)}
  100%{box-shadow:0 0 0 0 rgba(255,122,26,0)}
}

.pill-nav{flex:1 1 auto;display:flex;justify-content:center;min-width:0}
.nav-list{
  display:flex;align-items:center;gap:2px;
  padding:5px;border-radius:var(--radius-pill);
  background:rgba(20,41,75,.72);
  border:1px solid rgba(127,212,216,.18);
  box-shadow:inset 0 1px 0 rgba(244,237,225,.06);
}
.nav-item{display:block}
.nav-link{
  display:block;padding:8px 14px;border-radius:var(--radius-pill);
  font-size:14.5px;font-weight:600;letter-spacing:.02em;
  color:var(--mist);white-space:nowrap;
  transition:color .18s var(--ease),background-color .18s var(--ease);
}
.nav-link:hover{color:var(--paper);background:rgba(127,212,216,.13)}
.nav-link[aria-current="page"]{color:var(--brown);background:var(--paper)}

.header-utility{
  display:flex;align-items:center;gap:10px;
  margin-left:auto;flex:0 0 auto;
}

.nav-toggle{
  display:none;
  width:44px;height:44px;
  flex-direction:column;align-items:center;justify-content:center;gap:5px;
  border-radius:14px;
  border:1px solid rgba(127,212,216,.28);
  background:rgba(20,41,75,.75);
  transition:border-color .2s var(--ease),background-color .2s var(--ease);
}
.nav-toggle:hover{border-color:var(--cyan)}
.nav-toggle-bar{
  display:block;width:18px;height:2px;border-radius:2px;
  background:var(--paper);
  transition:transform .22s var(--ease),opacity .22s var(--ease);
}
.site-header[data-open] .nav-toggle-bar:nth-child(1){transform:translateY(7px) 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(-7px) rotate(-45deg)}

/* ---------- 7. 页脚 ---------- */
.site-footer{
  position:relative;
  overflow:hidden;
  margin-top:var(--section-pad);
  padding:clamp(52px,7vw,96px) 0 30px;
  background-color:var(--ink-900);
  color:var(--text-on-dark);
  border-top:1px solid rgba(127,212,216,.16);
}
.site-footer::before{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.6;
  background-image:
    radial-gradient(circle at 7% 18%, rgba(244,237,225,.85) 0 1.2px, transparent 1.4px),
    radial-gradient(circle at 23% 62%, rgba(127,212,216,.80) 0 1.4px, transparent 1.6px),
    radial-gradient(circle at 40% 12%, rgba(244,237,225,.60) 0 1px, transparent 1.2px),
    radial-gradient(circle at 62% 46%, rgba(244,237,225,.75) 0 1.3px, transparent 1.5px),
    radial-gradient(circle at 79% 20%, rgba(216,169,75,.85) 0 1.5px, transparent 1.7px),
    radial-gradient(circle at 92% 70%, rgba(127,212,216,.70) 0 1.2px, transparent 1.4px),
    radial-gradient(circle at 54% 88%, rgba(244,237,225,.50) 0 1px, transparent 1.2px);
}
.footer-inner{position:relative;z-index:1}

.footer-top{
  display:grid;
  grid-template-columns:minmax(230px,1fr) minmax(0,2.05fr);
  gap:clamp(28px,4vw,64px);
}

.footer-brand{max-width:32ch}
.footer-brand-link{display:inline-flex;align-items:center;gap:10px}
.footer-brand-name{
  font-family:var(--font-display);font-weight:900;
  font-size:clamp(17px,1.6vw,20px);letter-spacing:.02em;
}
.footer-tagline{margin-top:14px;font-size:15px;line-height:1.7;color:var(--paper)}
.footer-note{margin-top:8px;font-size:13px;line-height:1.7;color:var(--mist)}

.footer-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:clamp(20px,3vw,40px);
}
.footer-group-title{
  font-family:var(--font-mono);font-size:12px;font-weight:700;
  letter-spacing:.2em;color:var(--cyan);text-transform:uppercase;
  margin-bottom:14px;
}
.footer-links{display:flex;flex-direction:column;gap:9px}
.footer-link{
  display:inline-block;
  font-size:14.5px;color:var(--mist);
  border-bottom:1px solid transparent;
  transition:color .18s var(--ease),border-color .18s var(--ease);
}
.footer-link:hover{color:var(--paper);border-bottom-color:var(--orange)}

.footer-contact{
  margin-top:clamp(32px,4vw,56px);
  padding-top:clamp(24px,3vw,36px);
  border-top:1px solid rgba(127,212,216,.18);
}
.footer-contact-title{
  font-family:var(--font-mono);font-size:12px;font-weight:700;
  letter-spacing:.2em;color:var(--cyan);text-transform:uppercase;
  margin-bottom:16px;
}
.contact-list{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:16px clamp(20px,3vw,40px);
}
.contact-item{min-width:0}
.contact-label{font-size:12.5px;letter-spacing:.06em;color:var(--mist)}
.contact-value{margin-top:5px;font-size:14.5px;line-height:1.7;color:var(--paper);word-break:break-word}
.contact-note{margin-top:16px;font-size:13px;line-height:1.7;color:var(--mist)}

.footer-bottom{
  margin-top:clamp(30px,4vw,52px);
  padding-top:20px;
  border-top:1px solid rgba(216,169,75,.5);
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:10px 28px;
  font-size:13px;line-height:1.7;color:var(--mist);
}
.footer-copy{display:flex;align-items:center;flex-wrap:wrap;gap:8px}
.legal-mark{
  display:inline-block;width:6px;height:6px;border-radius:50%;
  background:var(--gold);
}
.footer-version{max-width:44em}
.footer-version .footer-link{font-size:13px}

/* ---------- 8. 浮层：滚动进度与回到顶部 ---------- */
.scroll-progress{
  position:fixed;top:0;left:0;z-index:130;
  width:100%;height:3px;
  transform:scaleX(0);transform-origin:0 50%;
  background:linear-gradient(90deg,var(--orange),var(--red) 55%,var(--cyan));
  pointer-events:none;
}
.to-top{
  position:fixed;right:20px;bottom:22px;z-index:120;
  width:44px;height:44px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  font-size:17px;font-weight:700;line-height:1;
  background:var(--ink-800);color:var(--paper);
  border:1px solid rgba(127,212,216,.32);
  box-shadow:var(--shadow-panel);
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity .24s var(--ease),transform .24s var(--ease),visibility .24s,border-color .2s var(--ease);
}
.to-top.is-visible{opacity:1;visibility:visible;transform:none}
.to-top:hover{border-color:var(--cyan)}

/* ---------- 9. 响应式 ---------- */
@media (max-width:1080px){
  .footer-top{grid-template-columns:1fr;gap:32px}
  .contact-list{grid-template-columns:repeat(2,minmax(0,1fr))}
}

@media (max-width:900px){
  .nav-toggle{display:flex}
  .pill-nav{
    position:absolute;
    top:calc(100% + 8px);
    left:0;right:0;
    display:block;
    max-height:0;
    overflow:hidden;
    visibility:hidden;
    opacity:0;
    transform:translateY(-6px);
    transition:max-height .3s var(--ease),opacity .24s var(--ease),transform .24s var(--ease),visibility .24s;
  }
  .site-header[data-open] .pill-nav{
    max-height:min(72vh,460px);
    overflow:auto;
    visibility:visible;
    opacity:1;
    transform:none;
  }
  .nav-list{
    flex-direction:column;align-items:stretch;gap:4px;
    padding:12px;border-radius:18px;
    background:rgba(20,41,75,.985);
    box-shadow:0 26px 50px -26px rgba(0,0,0,.95);
  }
  .nav-link{padding:13px 16px;font-size:16px;border-radius:12px;color:var(--paper)}
  .nav-link[aria-current="page"]{background:var(--paper);color:var(--brown)}
  .grid--2,.grid--3{grid-template-columns:minmax(0,1fr)}
  .site-header.is-condensed .nav-link{padding:13px 16px;font-size:16px}
}

@media (max-width:820px){
  .header-utility .btn--cta{display:none}
}

@media (max-width:680px){
  :root{--shell:min(1240px,calc(100% - 32px))}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .contact-list{grid-template-columns:minmax(0,1fr)}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .to-top{right:14px;bottom:16px}
  .media-frame--wide{aspect-ratio:16/9}
}

@media (max-width:440px){
  .footer-grid{grid-template-columns:minmax(0,1fr)}
  .brand-name{font-size:16px}
}

/* ---------- 10. 动效偏好 ---------- */
@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;
  }
  .cut-panel:hover{transform:none}
}