/* =========================================================
   星空体育站 · 共享样式 /assets/site.css
   深空蓝黑底 + 星云紫 / 荧光青渐变 + 暖金关键点
   ========================================================= */

/* ---------- 1. reset ---------- */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{margin:0;}
h1,h2,h3,h4,h5,p,figure,blockquote{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
img,svg,video{display:block;max-width:100%;height:auto;}
button{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer;}
input,select,textarea{font:inherit;}
a{color:inherit;text-decoration:none;}
[hidden]{display:none !important;}
:focus-visible{outline:2px solid #22D3EE;outline-offset:3px;border-radius:6px;}

/* ---------- 2. 变量 ---------- */
:root{
  --ink:#050816;
  --ink-2:#0B1226;
  --ink-3:#111A33;
  --violet:#7C4DFF;
  --cyan:#22D3EE;
  --gold:#F5B841;
  --green:#3DDC97;
  --red:#FF5A5F;
  --text:#F8FAFC;
  --muted:#94A3B8;
  --line:rgba(255,255,255,.12);
  --line-2:rgba(255,255,255,.06);
  --line-strong:rgba(255,255,255,.24);
  --font-sans:"HarmonyOS Sans SC","Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:"JetBrains Mono","Roboto Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --radius:16px;
  --radius-sm:10px;
  --radius-pill:999px;
  --gap:1.5rem;
  --shell:1360px;
  --header-h:112px;
  --shadow:0 24px 60px -32px rgba(0,0,0,.95);
}

/* ---------- 3. 页面基底 ---------- */
body{
  min-height:100vh;
  background-color:var(--ink);
  background-image:
    radial-gradient(1100px 620px at 84% -12%, rgba(124,77,255,.22), transparent 60%),
    radial-gradient(820px 560px at 4% 2%, rgba(34,211,238,.13), transparent 62%),
    radial-gradient(700px 700px at 50% 118%, rgba(124,77,255,.10), transparent 70%);
  background-attachment:fixed;
  color:var(--text);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.75;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}

/* ---------- 4. 中文排版 ---------- */
h1,h2,h3,h4{font-weight:700;line-height:1.12;letter-spacing:-.02em;color:var(--text);}
h1{font-size:clamp(2.4rem,6vw,5.6rem);font-weight:800;line-height:.98;letter-spacing:-.03em;}
h2{font-size:clamp(1.6rem,3.6vw,2.75rem);}
h3{font-size:clamp(1.1rem,1.8vw,1.35rem);}
p{line-height:1.75;}
.num,.stat__value,.timeline__time,.nav-link__index,.section__index,.footer__key{
  font-family:var(--font-mono);
  font-feature-settings:"tnum" 1;
  letter-spacing:.05em;
}
.prose{max-width:68ch;color:#dbe3ef;font-size:1rem;}
.prose p{margin-bottom:1.1em;line-height:1.85;}
.prose p:last-child{margin-bottom:0;}
.prose strong{color:var(--text);font-weight:600;}
.prose a{color:var(--cyan);border-bottom:1px solid rgba(34,211,238,.4);}
.prose a:hover{border-bottom-color:var(--cyan);}
.list-plain li{position:relative;padding-left:1.1rem;color:var(--muted);font-size:.925rem;margin-bottom:.4rem;}
.list-plain li::before{content:"";position:absolute;left:0;top:.75em;width:5px;height:1px;background:var(--cyan);}

/* ---------- 5. 布局工具 ---------- */
.container{width:100%;max-width:var(--shell);margin-inline:auto;padding-inline:1.15rem;}
.container--narrow{max-width:820px;}
@media (min-width:768px){.container{padding-inline:2rem;}}
@media (min-width:1280px){.container{padding-inline:2.5rem;}}

.section{position:relative;padding-block:clamp(3rem,7vw,6rem);}
.section--tight{padding-block:clamp(2rem,4vw,3.5rem);}
.section__head{display:grid;gap:.65rem;margin-bottom:clamp(1.6rem,3vw,2.6rem);}
.section__index{
  display:block;
  font-size:clamp(2.2rem,5vw,3.6rem);
  line-height:1;
  color:rgba(124,77,255,.3);
  -webkit-text-stroke:1px rgba(124,77,255,.55);
}
.section__title{font-size:clamp(1.5rem,3.4vw,2.4rem);font-weight:700;letter-spacing:-.02em;line-height:1.15;}
.section__lead{max-width:62ch;color:var(--muted);font-size:.98rem;}

.grid{display:grid;gap:var(--gap);}
@media (min-width:860px){
  .grid--2{grid-template-columns:repeat(2,minmax(0,1fr));}
  .grid--3{grid-template-columns:repeat(3,minmax(0,1fr));}
  .grid--4-8{grid-template-columns:4fr 8fr;}
  .grid--3-9{grid-template-columns:3fr 9fr;}
  .grid--7-5{grid-template-columns:7fr 5fr;}
}

.divider{height:1px;border:0;background:linear-gradient(90deg,var(--line),rgba(255,255,255,0));margin-block:clamp(1.5rem,3vw,2.5rem);}

.eyebrow{
  display:inline-flex;align-items:center;gap:.55rem;
  font-family:var(--font-mono);font-size:.72rem;letter-spacing:.24em;
  color:var(--muted);text-transform:uppercase;
}
.eyebrow::before{content:"";width:22px;height:1px;background:linear-gradient(90deg,var(--violet),var(--cyan));}

.annotation{
  writing-mode:vertical-rl;
  text-orientation:mixed;
  font-size:.78rem;
  font-weight:300;
  letter-spacing:.34em;
  color:var(--muted);
  padding-block:.5rem;
}
@media (max-width:760px){.annotation{writing-mode:horizontal-tb;letter-spacing:.2em;}}

.breadcrumbs{display:flex;flex-wrap:wrap;align-items:center;gap:.5rem;font-size:.8125rem;color:var(--muted);}
.breadcrumbs a{color:var(--muted);border-bottom:1px solid transparent;transition:color .2s ease,border-color .2s ease;}
.breadcrumbs a:hover{color:var(--cyan);border-bottom-color:var(--cyan);}
.breadcrumbs__sep{font-family:var(--font-mono);opacity:.45;}

/* ---------- 6. 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;gap:.5rem;
  padding:.7rem 1.2rem;border-radius:var(--radius-pill);
  border:1px solid var(--line);background:rgba(255,255,255,.04);
  color:var(--text);font-size:.875rem;font-weight:600;letter-spacing:.01em;
  transition:transform .2s ease,background .2s ease,border-color .2s ease,box-shadow .25s ease;
}
.btn:hover{transform:translateY(-1px);border-color:var(--line-strong);background:rgba(255,255,255,.08);}
.btn--gold{
  background:linear-gradient(135deg,var(--gold),#ffd37a);
  border-color:transparent;color:#1a1204;
  box-shadow:0 12px 32px -16px rgba(245,184,65,.85);
}
.btn--gold:hover{background:linear-gradient(135deg,#ffd37a,var(--gold));box-shadow:0 16px 36px -14px rgba(245,184,65,.95);}
.btn--cyan{background:linear-gradient(135deg,var(--cyan),#67e8f9);border-color:transparent;color:#04222a;}
.btn--ghost{background:transparent;border-color:var(--line-strong);color:var(--muted);}
.btn--ghost:hover{color:var(--text);}
.btn--sm{padding:.45rem .9rem;font-size:.8rem;}

.tool-btn{
  display:inline-flex;align-items:center;gap:.4rem;
  padding:.5rem .95rem;border-radius:var(--radius-pill);
  border:1px solid var(--line-strong);background:rgba(255,255,255,.04);
  color:var(--muted);font-size:.8rem;
  transition:color .2s ease,border-color .2s ease,box-shadow .25s ease;
}
.tool-btn:hover{color:var(--text);border-color:var(--cyan);box-shadow:0 0 0 3px rgba(34,211,238,.12);}

/* ---------- 7. 页头 ---------- */
.skip-link{
  position:absolute;left:1rem;top:-120px;z-index:200;
  padding:.6rem 1.1rem;border-radius:var(--radius-pill);
  background:var(--gold);color:#1a1204;font-weight:700;font-size:.85rem;
  transition:top .2s ease;
}
.skip-link:focus{top:.6rem;}

.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(5,8,22,.9);
  -webkit-backdrop-filter:blur(16px) saturate(140%);
  backdrop-filter:blur(16px) saturate(140%);
  border-bottom:1px solid var(--line);
}

.scroll-progress{
  position:absolute;left:0;right:0;bottom:0;height:2px;width:100%;
  transform:scaleX(0);transform-origin:left center;
  background:linear-gradient(90deg,var(--violet),var(--cyan) 55%,var(--gold));
  pointer-events:none;z-index:5;
}

/* 品牌条 */
.brandbar{
  border-bottom:1px solid var(--line-2);
  background:linear-gradient(90deg,rgba(124,77,255,.18),rgba(34,211,238,.09) 46%,rgba(5,8,22,0) 82%);
}
.brandbar__inner{
  display:flex;align-items:center;justify-content:space-between;
  gap:1rem;flex-wrap:wrap;min-height:46px;padding-block:.4rem;
}
.brandbar__brand{display:flex;align-items:center;gap:.6rem;flex-wrap:wrap;font-size:.8125rem;color:var(--muted);}
.brandbar__mark{
  width:10px;height:10px;flex:none;border-radius:50%;
  background:conic-gradient(from 0deg,var(--violet),var(--cyan),var(--violet));
  box-shadow:0 0 14px rgba(124,77,255,.9);
}
.brandbar__name{color:var(--text);font-weight:700;letter-spacing:.08em;}
.brandbar__tag{position:relative;padding-left:.75rem;color:var(--muted);}
.brandbar__tag::before{
  content:"";position:absolute;left:0;top:50%;width:3px;height:3px;
  margin-top:-1.5px;border-radius:50%;background:var(--cyan);
}
.brandbar__meta{display:flex;align-items:center;gap:.75rem;flex-wrap:wrap;}

.status-pill{
  display:inline-flex;align-items:center;gap:.5rem;
  padding:.28rem .7rem;border-radius:var(--radius-pill);
  border:1px solid rgba(61,220,151,.35);
  background:rgba(61,220,151,.08);
  font-size:.75rem;letter-spacing:.02em;color:#bff2dd;
}
.status-pill__dot{
  width:7px;height:7px;flex:none;border-radius:50%;background:var(--green);
  box-shadow:0 0 0 4px rgba(61,220,151,.18);
  animation:pulse 2.6s ease-in-out infinite;
}
@keyframes pulse{
  0%,100%{opacity:1;transform:scale(1);}
  50%{opacity:.45;transform:scale(.78);}
}

/* 星轨导航 */
.topnav{position:relative;}
.topnav__inner{display:flex;align-items:center;justify-content:space-between;gap:1rem;min-height:64px;}
.nav-list{display:flex;align-items:center;gap:.1rem;}
.nav-item{position:relative;}
.nav-link{
  position:relative;display:flex;flex-direction:column;gap:1px;
  padding:.55rem .85rem .7rem;border-radius:var(--radius-sm);
  color:var(--muted);
  transition:color .25s ease,background .25s ease;
}
.nav-link::after{
  content:"";position:absolute;left:.85rem;right:.85rem;bottom:.32rem;height:1px;
  background:linear-gradient(90deg,var(--violet),var(--cyan));
  transform:scaleX(0);transform-origin:left center;
  transition:transform .38s cubic-bezier(.2,.7,.2,1);
}
.nav-link:hover{color:var(--text);background:rgba(124,77,255,.08);}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link[aria-current="page"]{color:var(--text);background:rgba(124,77,255,.14);}
.nav-link[aria-current="page"]::after{transform:scaleX(1);}
.nav-link__top{display:flex;align-items:center;gap:.45rem;}
.nav-link__index{font-size:.68rem;color:var(--cyan);line-height:1;}
.nav-link__label{font-size:.95rem;font-weight:500;line-height:1.35;}
.nav-link__note{font-size:.7rem;color:rgba(148,163,184,.6);letter-spacing:.02em;line-height:1.3;}
.nav-link:hover .nav-link__note,.nav-link[aria-current="page"] .nav-link__note{color:var(--cyan);}

.nav-toggle{
  display:none;align-items:center;gap:.55rem;margin-left:auto;
  padding:.5rem .85rem;border-radius:var(--radius-pill);
  border:1px solid var(--line-strong);color:var(--text);font-size:.8rem;
}
.nav-toggle__bars{display:inline-flex;flex-direction:column;justify-content:center;gap:4px;width:18px;}
.nav-toggle__bars span{display:block;height:1.5px;border-radius:2px;background:var(--cyan);transition:transform .25s ease,opacity .25s ease;}
[data-nav][data-open="true"] .nav-toggle__bars span:nth-child(1){transform:translateY(5.5px) rotate(45deg);}
[data-nav][data-open="true"] .nav-toggle__bars span:nth-child(2){opacity:0;}
[data-nav][data-open="true"] .nav-toggle__bars span:nth-child(3){transform:translateY(-5.5px) rotate(-45deg);}

@media (max-width:920px){
  .topnav__inner{min-height:56px;}
  .nav-toggle{display:inline-flex;}
  .brandbar__tag{display:none;}
  .status-pill{display:none;}
  .nav-list{
    position:absolute;left:0;right:0;top:100%;
    display:none;flex-direction:column;align-items:stretch;gap:.1rem;
    padding:.75rem 1rem 1.1rem;
    max-height:min(74vh,560px);overflow-y:auto;
    background:linear-gradient(180deg,rgba(11,18,38,.99),rgba(5,8,22,.99));
    border-bottom:1px solid var(--line);
    box-shadow:var(--shadow);
  }
  [data-nav][data-open="true"] .nav-list{display:flex;}
  .nav-item{border-bottom:1px solid var(--line-2);}
  .nav-item:last-child{border-bottom:0;}
  .nav-link{padding:.8rem .7rem;border-radius:var(--radius-sm);}
  .nav-link::after{left:.7rem;right:.7rem;bottom:.5rem;}
}

/* ---------- 8. 页脚 ---------- */
.site-footer{
  position:relative;margin-top:clamp(3rem,8vw,7rem);
  border-top:1px solid var(--line);
  background:linear-gradient(180deg,rgba(11,18,38,.6),rgba(5,8,22,1) 42%);
  overflow:hidden;
}
.footer__orbit{
  position:absolute;left:-20%;right:-20%;top:-60%;height:560px;pointer-events:none;
  background:
    radial-gradient(58% 58% at 22% 22%, rgba(124,77,255,.24), transparent 62%),
    radial-gradient(50% 50% at 78% 14%, rgba(34,211,238,.16), transparent 64%);
}
.footer__inner{position:relative;padding-block:clamp(2.5rem,6vw,4.5rem) 1.5rem;}
.footer__grid{display:grid;gap:2rem;grid-template-columns:1fr;}
@media (min-width:640px){.footer__grid{grid-template-columns:repeat(2,minmax(0,1fr));}}
@media (min-width:1000px){.footer__grid{grid-template-columns:1.6fr 1fr 1fr 1.5fr;gap:2.5rem;}}

.footer__brand{padding-right:1rem;}
.footer__mark{font-size:1.15rem;font-weight:800;letter-spacing:.14em;color:var(--text);}
.footer__mark::after{
  content:"";display:block;width:46px;height:2px;margin-top:.7rem;
  background:linear-gradient(90deg,var(--violet),var(--cyan));
}
.footer__slogan{margin-top:.9rem;font-size:.9rem;color:var(--muted);line-height:1.8;max-width:34ch;}
.footer__note{margin-top:.6rem;font-size:.78rem;color:rgba(148,163,184,.7);}

.footer__title{
  position:relative;font-size:.75rem;font-weight:600;letter-spacing:.2em;
  color:var(--text);padding-left:.75rem;margin-bottom:1rem;
}
.footer__title::before{
  content:"";position:absolute;left:0;top:.55em;width:5px;height:5px;border-radius:50%;
  background:var(--cyan);box-shadow:0 0 10px rgba(34,211,238,.8);
}
.footer__list li{margin-bottom:.55rem;}
.footer__list a{
  font-size:.875rem;color:var(--muted);
  border-bottom:1px solid transparent;
  transition:color .2s ease,border-color .2s ease,padding-left .2s ease;
}
.footer__list a:hover{color:var(--cyan);border-bottom-color:rgba(34,211,238,.5);padding-left:3px;}

.footer__list--contact li{display:grid;gap:.15rem;margin-bottom:.95rem;}
.footer__key{font-size:.68rem;letter-spacing:.16em;color:rgba(148,163,184,.75);}
.footer__val{font-size:.85rem;line-height:1.65;color:#dbe3ef;word-break:break-word;}

.footer__bottom{
  margin-top:clamp(2rem,4vw,3rem);padding-top:1.25rem;
  border-top:1px solid var(--line-2);
  display:flex;flex-wrap:wrap;align-items:center;gap:.85rem 1.5rem;
}
.footer__legal{font-size:.78rem;color:var(--muted);letter-spacing:.02em;}
.footer__meta{font-size:.78rem;color:rgba(148,163,184,.65);}
.footer__tools{display:flex;flex-wrap:wrap;gap:.6rem;margin-left:auto;}

/* ---------- 9. 通用组件 ---------- */
.card{
  position:relative;padding:1.35rem 1.35rem 1.5rem;
  border:1px solid var(--line);border-radius:var(--radius);
  background:linear-gradient(180deg,rgba(17,26,51,.75),rgba(5,8,22,.55));
  box-shadow:var(--shadow);
  transition:border-color .25s ease,transform .25s ease;
}
.card:hover{border-color:var(--line-strong);transform:translateY(-2px);}
.card__title{font-size:1.05rem;font-weight:700;letter-spacing:-.01em;margin-bottom:.5rem;}
.card__text{color:var(--muted);font-size:.9rem;line-height:1.75;}

.panel{
  border:1px solid var(--line);border-radius:var(--radius);
  background:rgba(11,18,38,.6);overflow:hidden;
}
.panel__trigger{
  display:flex;width:100%;align-items:center;justify-content:space-between;gap:1rem;
  padding:1.05rem 1.25rem;text-align:left;font-size:.98rem;font-weight:600;color:var(--text);
  transition:background .2s ease;
}
.panel__trigger:hover{background:rgba(124,77,255,.1);}
.panel__icon{position:relative;flex:none;width:22px;height:22px;border-radius:50%;border:1px solid var(--line-strong);}
.panel__icon::before,.panel__icon::after{
  content:"";position:absolute;left:50%;top:50%;background:var(--cyan);
  transform:translate(-50%,-50%);
}
.panel__icon::before{width:10px;height:1.5px;}
.panel__icon::after{width:1.5px;height:10px;transition:transform .25s ease,opacity .25s ease;}
.panel__trigger[aria-expanded="true"] .panel__icon::after{transform:translate(-50%,-50%) scaleY(0);opacity:0;}
.panel__body{
  padding:1rem 1.25rem 1.25rem;border-top:1px solid var(--line-2);
  color:var(--muted);font-size:.92rem;line-height:1.8;
}

.stat-row{display:grid;gap:1rem;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));}
.stat{padding:.35rem 0 .35rem .9rem;border-left:2px solid var(--violet);}
.stat__value{display:block;font-size:clamp(1.35rem,2.6vw,2rem);font-weight:700;line-height:1.1;color:var(--cyan);}
.stat__label{display:block;margin-top:.28rem;font-size:.78rem;letter-spacing:.06em;color:var(--muted);}

.tag{
  display:inline-flex;align-items:center;gap:.35rem;
  padding:.2rem .6rem;border-radius:var(--radius-pill);
  border:1px solid var(--line);
  font-family:var(--font-mono);font-size:.72rem;letter-spacing:.06em;color:var(--muted);
}
.tag--cyan{color:var(--cyan);border-color:rgba(34,211,238,.4);background:rgba(34,211,238,.08);}
.tag--gold{color:var(--gold);border-color:rgba(245,184,65,.4);background:rgba(245,184,65,.08);}
.tag--green{color:var(--green);border-color:rgba(61,220,151,.4);background:rgba(61,220,151,.08);}
.tag--red{color:var(--red);border-color:rgba(255,90,95,.4);background:rgba(255,90,95,.08);}

.timeline{position:relative;padding-left:1.9rem;}
.timeline::before{
  content:"";position:absolute;left:5.5px;top:.5rem;bottom:.5rem;width:1px;
  background:linear-gradient(180deg,var(--violet),var(--cyan),rgba(34,211,238,0));
}
.timeline__item{position:relative;padding-bottom:1.5rem;}
.timeline__item:last-child{padding-bottom:0;}
.timeline__dot{
  position:absolute;left:-1.9rem;top:.5rem;width:11px;height:11px;border-radius:50%;
  background:var(--ink);border:1px solid var(--cyan);
  box-shadow:0 0 0 4px rgba(34,211,238,.12);
}
.timeline__time{display:block;font-size:.78rem;color:var(--cyan);}
.timeline__text{margin-top:.2rem;font-size:.94rem;color:#dbe3ef;line-height:1.75;}

.chapters{position:sticky;top:calc(var(--header-h) + 1.25rem);}
.chapters__title{
  margin-bottom:.85rem;font-family:var(--font-mono);font-size:.7rem;
  letter-spacing:.26em;color:var(--muted);text-transform:uppercase;
}
.chapters__list{border-left:1px solid var(--line);}
.chapters__link{
  display:block;margin-left:-1px;
  padding:.5rem .9rem;font-size:.875rem;color:var(--muted);
  border-left:2px solid transparent;
  transition:color .2s ease,border-color .2s ease,background .2s ease;
}
.chapters__link:hover{color:var(--text);background:rgba(255,255,255,.03);}
.chapters__link[data-current="true"]{
  color:var(--text);border-left-color:var(--cyan);
  background:linear-gradient(90deg,rgba(34,211,238,.14),rgba(34,211,238,0));
}

.media-frame{
  position:relative;overflow:hidden;border-radius:var(--radius);
  border:1px solid var(--line);
  aspect-ratio:16 / 9;
  background-color:var(--ink-2);
  background-image:
    radial-gradient(120% 90% at 20% 0%, rgba(124,77,255,.38), transparent 62%),
    radial-gradient(120% 90% at 92% 100%, rgba(34,211,238,.22), transparent 64%),
    linear-gradient(180deg,rgba(17,26,51,.9),rgba(5,8,22,.9));
}
.media-frame img{width:100%;height:100%;object-fit:cover;}
.media-frame--wide{aspect-ratio:21 / 9;}
.media-frame--tall{aspect-ratio:3 / 4;}
.media-frame--square{aspect-ratio:1 / 1;}
.media-frame__caption{
  position:absolute;left:0;right:0;bottom:0;
  padding:.85rem 1rem;font-size:.78rem;color:var(--muted);
  background:linear-gradient(0deg,rgba(5,8,22,.92),rgba(5,8,22,0));
}

/* ---------- 10. 显现 ---------- */
.js [data-reveal]{
  opacity:0;transform:translateY(18px);
  transition:opacity .6s ease,transform .6s cubic-bezier(.2,.7,.2,1);
}
.js [data-reveal].is-visible{opacity:1;transform:none;}

/* ---------- 11. 无障碍与降级 ---------- */
@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;}
}