/* ==========================================================================
   星空平台赛场 · /assets/site.css
   共享外壳：reset / 变量 / 中文排版 / 头部 / 页脚 / 通用组件
   ========================================================================== */

/* ---------- 变量 ---------- */
:root{
  --deep:#05081A;
  --curtain:#0D1330;
  --glass:rgba(122,140,255,0.08);
  --glass-line:rgba(122,140,255,0.22);
  --plate:#131A3A;
  --violet:#7A5CFF;
  --violet-deep:#3B2496;
  --cyan:#2BE6F6;
  --gold:#FFC46B;
  --text:#E9EDFB;
  --muted:#A3AEDA;
  --line:#2A3358;

  --shell:1220px;
  --gutter:clamp(16px,4vw,40px);
  --radius:22px;
  --radius-sm:14px;

  --font-display:"HarmonyOS Sans SC","Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-body:var(--font-display);
  --font-mono:"JetBrains Mono","Roboto Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,"Courier New",monospace;

  --shadow-soft:0 24px 60px -34px rgba(0,0,0,0.95);
  --shadow-plate:0 30px 70px -42px rgba(0,0,0,0.98);
  --ease:cubic-bezier(.22,.61,.36,1);
  --nav-break:900px;
}

/* ---------- reset ---------- */
*,*::before,*::after{box-sizing:border-box;}
html,body{margin:0;padding:0;}
html{
  scroll-behavior:smooth;
  scroll-padding-top:120px;
  -webkit-text-size-adjust:100%;
}
h1,h2,h3,h4,h5,p,ul,ol,figure,blockquote,dl,dd{margin:0;}
ul,ol{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;}
:where(a,button,summary,input,select,textarea):focus-visible{
  outline:2px solid var(--cyan);
  outline-offset:3px;
  border-radius:8px;
}

/* ---------- 星场背景与中文排版 ---------- */
body{
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.75;
  color:var(--text);
  letter-spacing:0.01em;
  word-break:break-word;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  background-color:var(--deep);
  background-image:
    radial-gradient(1.4px 1.4px at 22px 34px, rgba(233,237,251,0.55), transparent 62%),
    radial-gradient(1.2px 1.2px at 152px 92px, rgba(43,230,246,0.50), transparent 62%),
    radial-gradient(1.6px 1.6px at 244px 46px, rgba(122,92,255,0.55), transparent 62%),
    radial-gradient(1100px 640px at 82% -8%, rgba(122,92,255,0.24), transparent 60%),
    radial-gradient(820px 560px at 4% 4%, rgba(43,230,246,0.10), transparent 62%),
    radial-gradient(720px 520px at 50% 118%, rgba(59,36,150,0.34), transparent 66%);
  background-size:300px 220px,300px 220px,300px 220px,100% 1400px,100% 1200px,100% 1600px;
  background-repeat:repeat,repeat,repeat,no-repeat,no-repeat,no-repeat;
  background-attachment:fixed;
}

h1,h2,h3,h4,.display{
  font-family:var(--font-display);
  font-weight:900;
  letter-spacing:-0.02em;
  line-height:1.14;
  color:var(--text);
  text-wrap:balance;
}
.display{font-size:clamp(40px,7vw,76px);}
h1{font-size:clamp(34px,5.4vw,58px);}
h2{font-size:clamp(26px,3.4vw,34px);font-weight:800;}
h3{font-size:22px;font-weight:700;line-height:1.32;}
h4{font-size:18px;font-weight:700;letter-spacing:0;line-height:1.4;}
strong{font-weight:700;color:var(--text);}
p{text-wrap:pretty;}

/* ---------- 通用工具 ---------- */
.shell{
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding-inline:var(--gutter);
}
.mono{font-family:var(--font-mono);letter-spacing:0.04em;}
.text-muted{color:var(--muted);}
.visually-hidden{
  position:absolute;width:1px;height:1px;margin:-1px;padding:0;
  overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0;
}
.skip-link{
  position:absolute;left:50%;top:-120px;transform:translateX(-50%);
  z-index:120;padding:10px 20px;border-radius:999px;
  background:linear-gradient(180deg,#FFD69B,var(--gold));
  color:#2A1A00;font-weight:800;font-size:14px;
  transition:top .22s var(--ease);
}
.skip-link:focus{top:12px;}

/* ---------- 区块节奏 ---------- */
.section{padding-block:clamp(48px,7vw,96px);}
.section--tight{padding-block:clamp(30px,4vw,56px);}
.section__head{
  display:flex;flex-direction:column;gap:14px;
  max-width:760px;margin-bottom:clamp(24px,3.6vw,46px);
}
.eyebrow{
  display:flex;align-items:center;gap:10px;
  font-family:var(--font-mono);
  font-size:12.5px;letter-spacing:0.16em;text-transform:uppercase;
  color:var(--cyan);
}
.eyebrow::before{
  content:"";width:28px;height:1px;flex:none;
  background:linear-gradient(90deg,var(--violet),rgba(43,230,246,0.2));
}
.lede{color:var(--muted);font-size:17px;max-width:68ch;line-height:1.78;}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  padding:11px 22px;border-radius:999px;
  font-size:15px;font-weight:700;letter-spacing:0.02em;line-height:1.2;
  border:1px solid var(--glass-line);
  background:var(--glass);
  color:var(--text);
  white-space:nowrap;
  transition:transform .25s var(--ease),background .25s var(--ease),
             border-color .25s var(--ease),color .25s var(--ease),box-shadow .25s var(--ease);
}
.btn:hover{transform:translateY(-2px);}
.btn:active{transform:translateY(0);}
.btn--gold{
  background:linear-gradient(180deg,#FFD69B,var(--gold));
  color:#2A1A00;border-color:transparent;
  box-shadow:0 14px 34px -18px rgba(255,196,107,0.85);
}
.btn--gold:hover{
  background:linear-gradient(180deg,#FFE3B8,#FFB94A);
  box-shadow:0 18px 40px -16px rgba(255,196,107,0.95);
}
.btn--ghost{background:transparent;color:var(--muted);}
.btn--ghost:hover{border-color:var(--cyan);color:var(--cyan);background:rgba(43,230,246,0.06);}
.btn--block{width:100%;}

/* ---------- 标签 / 状态 ---------- */
.chip{
  display:inline-flex;align-items:center;gap:7px;
  padding:5px 12px;border-radius:999px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:0.04em;
  color:var(--muted);
  background:var(--glass);
  border:1px solid var(--glass-line);
  white-space:nowrap;
}
.chip--cyan{color:var(--cyan);border-color:rgba(43,230,246,0.38);}
.chip--gold{color:var(--gold);border-color:rgba(255,196,107,0.42);}

/* ---------- 面包屑 ---------- */
.breadcrumb{padding-top:clamp(18px,3vw,32px);}
.breadcrumb__list{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-family:var(--font-mono);font-size:12.5px;letter-spacing:0.04em;color:var(--muted);
}
.breadcrumb__list li{display:flex;align-items:center;gap:8px;min-width:0;}
.breadcrumb__list li + li::before{content:"/";color:var(--line);}
.breadcrumb__list a{color:var(--muted);transition:color .2s var(--ease);}
.breadcrumb__list a:hover{color:var(--cyan);}
.breadcrumb__list [aria-current="page"]{color:var(--text);}

/* ---------- 网格 ---------- */
.grid{display:grid;gap:clamp(16px,2vw,26px);}
.grid--12{grid-template-columns:repeat(12,minmax(0,1fr));}
.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-12{grid-column:span 12;}

/* ---------- 内容层 ---------- */
.plate{
  background:linear-gradient(180deg,rgba(19,26,58,0.94),rgba(13,19,48,0.9));
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:clamp(18px,2.2vw,28px);
  box-shadow:var(--shadow-plate);
  min-width:0;
}
.glass{
  background:var(--glass);
  border:1px solid var(--glass-line);
  border-radius:var(--radius);
  backdrop-filter:blur(12px);
  padding:clamp(16px,2vw,24px);
  min-width:0;
}
.rail{position:relative;padding-left:22px;}
.rail::before{
  content:"";position:absolute;left:0;top:6px;bottom:6px;width:1px;
  background:linear-gradient(180deg,var(--violet),rgba(122,92,255,0));
}

/* ---------- 图片容器（页面阶段放 img） ---------- */
.media{
  position:relative;display:block;overflow:hidden;
  border-radius:var(--radius-sm);
  border:1px solid var(--line);
  background:
    radial-gradient(120% 90% at 20% 0%, rgba(122,92,255,0.24), transparent 62%),
    linear-gradient(135deg,var(--curtain),var(--plate));
}
.media img{width:100%;height:100%;object-fit:cover;display:block;}
.media--16x9{aspect-ratio:16/9;}
.media--3x2{aspect-ratio:3/2;}
.media--4x5{aspect-ratio:4/5;}
.media--1x1{aspect-ratio:1/1;}
.media--glow{
  border-color:rgba(255,196,107,0.34);
  box-shadow:0 0 0 1px rgba(255,196,107,0.14),0 26px 54px -32px rgba(255,196,107,0.7);
}
.media__badge{position:absolute;left:12px;top:12px;z-index:2;}
.media__cap{
  position:absolute;left:0;right:0;bottom:0;z-index:2;
  padding:26px 16px 14px;
  font-size:14px;line-height:1.5;color:var(--text);
  background:linear-gradient(180deg,transparent,rgba(5,8,26,0.88));
}

/* ---------- 入场渐显 ---------- */
html.js [data-reveal]{
  opacity:0;
  transform:translateY(12px);
  transition:opacity .32s var(--ease),transform .32s var(--ease);
}
html.js [data-reveal].is-in{opacity:1;transform:none;}

/* ==========================================================================
   头部 · 星轨浮岛
   ========================================================================== */
.progress{
  position:fixed;top:0;left:0;right:0;height:2px;z-index:90;
  background:rgba(122,140,255,0.12);
  pointer-events:none;
}
.progress__bar{
  display:block;height:100%;width:0;
  background:linear-gradient(90deg,var(--violet),var(--cyan));
  box-shadow:0 0 12px rgba(43,230,246,0.65);
  transition:width .1s linear;
}

.site-header{
  position:sticky;top:0;z-index:60;
  padding-block:14px;
  transition:padding .3s var(--ease);
}
.site-header[data-compact]{padding-block:7px;}

.orbit-island{
  position:relative;
  display:flex;align-items:center;gap:clamp(10px,1.6vw,22px);
  padding:8px 12px 8px 18px;
  border-radius:999px;
  background:linear-gradient(180deg,rgba(13,19,48,0.88),rgba(5,8,26,0.82));
  border:1px solid var(--glass-line);
  box-shadow:0 20px 46px -28px rgba(0,0,0,0.95),inset 0 1px 0 rgba(233,237,251,0.06);
  backdrop-filter:blur(18px);
  transition:padding .3s var(--ease),box-shadow .3s var(--ease),background .3s var(--ease);
}
.site-header[data-compact] .orbit-island{
  padding-block:5px;
  box-shadow:0 14px 32px -24px rgba(0,0,0,0.98),inset 0 1px 0 rgba(233,237,251,0.06);
  background:linear-gradient(180deg,rgba(13,19,48,0.96),rgba(5,8,26,0.94));
}

/* 品牌徽章 */
.brand{display:inline-flex;align-items:center;gap:11px;flex:none;min-width:0;}
.brand__mark{
  position:relative;width:34px;height:34px;border-radius:50%;flex:none;
  background:conic-gradient(from 210deg,var(--violet),var(--cyan) 38%,var(--violet-deep) 68%,var(--violet));
  box-shadow:0 0 22px -6px var(--violet),inset 0 0 0 1px rgba(233,237,251,0.22);
  transition:box-shadow .45s var(--ease);
}
.brand__mark::before{
  content:"";position:absolute;inset:5px;border-radius:50%;background:var(--deep);
}
.brand__mark::after{
  content:"";position:absolute;inset:13px;border-radius:50%;background:var(--gold);
  box-shadow:0 0 10px rgba(255,196,107,0.9);
}
.brand:hover .brand__mark{box-shadow:0 0 30px -4px var(--cyan),inset 0 0 0 1px rgba(233,237,251,0.3);}
.brand__text{display:flex;flex-direction:column;line-height:1.16;min-width:0;}
.brand__name{font-size:15.5px;font-weight:800;letter-spacing:0.01em;color:var(--text);white-space:nowrap;}
.brand__tag{
  font-family:var(--font-mono);font-size:10.5px;letter-spacing:0.08em;
  color:var(--muted);white-space:nowrap;
}

/* 移动菜单按钮 */
.nav-toggle{
  display:none;align-items:center;gap:9px;
  margin-left:auto;
  padding:9px 15px;border-radius:999px;
  border:1px solid var(--glass-line);
  background:var(--glass);
  font-size:13px;font-weight:700;letter-spacing:0.08em;color:var(--muted);
  transition:color .22s var(--ease),border-color .22s var(--ease),background .22s var(--ease);
}
.nav-toggle__bars{display:inline-flex;flex-direction:column;gap:4px;width:16px;}
.nav-toggle__bars span{
  height:2px;border-radius:2px;background:currentColor;
  transition:transform .25s var(--ease),width .25s var(--ease);
}
.nav-toggle__bars span:last-child{width:11px;}
.nav-toggle[aria-expanded="true"]{
  color:var(--cyan);border-color:rgba(43,230,246,0.45);background:rgba(43,230,246,0.08);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:first-child{transform:translateY(3px) rotate(45deg);}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:last-child{width:16px;transform:translateY(-3px) rotate(-45deg);}

/* 导航 */
.nav{display:flex;align-items:center;margin-left:auto;min-width:0;}
.nav__list{display:flex;align-items:center;gap:2px;}
.nav__link{
  display:block;padding:9px 14px;border-radius:999px;
  font-size:14.5px;font-weight:600;color:var(--muted);
  transition:color .2s var(--ease),background .2s var(--ease),box-shadow .2s var(--ease);
}
.nav__link:hover{color:var(--text);background:rgba(122,140,255,0.13);}
.nav__link[aria-current="page"]{
  color:var(--text);
  background:rgba(122,92,255,0.22);
  box-shadow:inset 0 0 0 1px rgba(122,140,255,0.42),0 0 24px -10px var(--violet);
}
.nav__meta{
  display:none;flex-wrap:wrap;gap:8px;
  margin-top:14px;padding-top:14px;border-top:1px solid var(--line);
}
.nav__cta{flex:none;}
.nav__cta--panel{display:none;}

/* ==========================================================================
   页脚 · 地面控制台
   ========================================================================== */
.site-footer{
  position:relative;
  margin-top:clamp(64px,9vw,130px);
  border-top:1px solid var(--line);
  background:
    radial-gradient(760px 380px at 12% 0%, rgba(122,92,255,0.20), transparent 62%),
    radial-gradient(620px 320px at 88% 8%, rgba(43,230,246,0.10), transparent 60%),
    linear-gradient(180deg,rgba(13,19,48,0.92),#04060F 62%);
}
.site-footer::before{
  content:"";position:absolute;left:0;right:0;top:-1px;height:1px;
  background:linear-gradient(90deg,transparent,var(--violet),var(--cyan),transparent);
  opacity:0.8;
}

.footer__grid{
  display:grid;
  gap:clamp(26px,4vw,54px);
  grid-template-columns:minmax(250px,1.45fr) repeat(4,minmax(0,0.9fr));
  padding:clamp(42px,6vw,78px) 0 clamp(28px,4vw,48px);
}
.footer__brand{display:flex;flex-direction:column;gap:16px;min-width:0;}
.footer__pitch{color:var(--muted);font-size:15px;line-height:1.72;max-width:34ch;}
.footer__stat{
  font-family:var(--font-mono);font-size:12.5px;letter-spacing:0.04em;color:var(--muted);
}
.footer__stat .mono{color:var(--gold);}

.footer__group{display:flex;flex-direction:column;gap:12px;min-width:0;}
.footer__group-title{
  font-family:var(--font-mono);
  font-size:12px;font-weight:500;letter-spacing:0.14em;text-transform:uppercase;
  color:var(--text);
  line-height:1.6;
}
.footer__links{display:flex;flex-direction:column;gap:10px;}
.footer__links a{
  font-size:14.5px;color:var(--muted);
  transition:color .2s var(--ease),transform .2s var(--ease);
}
.footer__links a:hover{color:var(--cyan);transform:translateX(3px);}

.footer__contact{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(210px,1fr));
  gap:clamp(16px,2.4vw,26px);
  padding:clamp(20px,3vw,30px);
  border-radius:var(--radius);
  background:var(--glass);
  border:1px solid var(--glass-line);
  backdrop-filter:blur(12px);
  margin-bottom:clamp(20px,3vw,32px);
}
.footer__field{display:flex;flex-direction:column;gap:6px;min-width:0;}
.footer__field--wide{grid-column:1/-1;}
.footer__field-key{
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:0.14em;
  text-transform:uppercase;color:var(--cyan);
}
.footer__field-val{font-size:14.5px;line-height:1.68;color:var(--text);word-break:break-word;}

.footer__legal{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:14px 28px;
  padding:20px 0 36px;
  border-top:1px solid var(--line);
  font-size:13px;color:var(--muted);
}
.footer__legal-links{display:flex;flex-wrap:wrap;gap:18px;}
.footer__legal-links a{color:var(--muted);transition:color .2s var(--ease);}
.footer__legal-links a:hover{color:var(--cyan);}
.footer__legal-text{
  display:flex;flex-wrap:wrap;align-items:center;
  font-family:var(--font-mono);font-size:12.5px;letter-spacing:0.04em;color:var(--muted);
}
.footer__sep{margin:0 9px;color:var(--line);}

/* ==========================================================================
   响应式
   ========================================================================== */
@media (max-width:1080px) and (min-width:901px){
  .nav__link{padding:9px 10px;font-size:13.5px;}
  .brand__tag{display:none;}
}

@media (max-width:1024px){
  .col-3,.col-4,.col-5{grid-column:span 6;}
  .col-7,.col-8{grid-column:span 12;}
  .footer__grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .footer__brand{grid-column:1/-1;}
}

@media (max-width:900px){
  .site-header{padding-block:10px;}
  .orbit-island{
    gap:10px;
    padding:8px 12px 8px 14px;
    border-radius:26px;
  }
  .nav-toggle{display:inline-flex;}
  .nav{
    position:absolute;
    left:var(--gutter);
    right:var(--gutter);
    top:calc(100% + 10px);
    display:none;
    flex-direction:column;
    align-items:stretch;
    margin-left:0;
    padding:16px;
    border-radius:26px;
    background:linear-gradient(180deg,rgba(13,19,48,0.98),rgba(5,8,26,0.98));
    border:1px solid var(--glass-line);
    box-shadow:var(--shadow-soft);
    max-height:min(72vh,540px);
    overflow-y:auto;
    backdrop-filter:blur(18px);
  }
  .nav[data-open]{display:flex;}
  .nav__list{flex-direction:column;align-items:stretch;gap:2px;}
  .nav__link{padding:13px 14px;font-size:16px;border-radius:16px;}
  .nav__link[aria-current="page"]{background:rgba(122,92,255,0.2);}
  .nav__meta{display:flex;}
  .nav__cta{display:none;}
  .nav__cta--panel{display:inline-flex;width:100%;margin-top:14px;}
}

@media (max-width:680px){
  body{font-size:16px;}
  .grid--12{grid-template-columns:1fr;}
  .col-3,.col-4,.col-5,.col-6,.col-7,.col-8,.col-12{grid-column:auto;}
  .footer__grid{grid-template-columns:1fr;}
  .footer__legal{flex-direction:column;align-items:flex-start;}
}

@media (max-width:480px){
  .brand__tag{display:none;}
  .brand__name{font-size:14.5px;}
  .brand__mark{width:30px;height:30px;}
  .brand__mark::after{inset:11px;}
  .nav-toggle__text{display:none;}
  .nav-toggle{padding:9px 12px;}
}

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