/* ============================================================
   完美体育看台 · /assets/site.css
   共享外壳：reset / 变量 / 中文排版 / 头部 / 页脚 / 通用组件
   ============================================================ */

*,*::before,*::after{ box-sizing:border-box; }

html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
  scroll-padding-top:128px;
}

body,h1,h2,h3,h4,h5,p,figure,blockquote,ul,ol,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; }
a{ color:inherit; }

:root{
  /* 看台色板 */
  --ink:#0B1F1A;
  --coal:#111614;
  --stand:#14352C;
  --cyan:#3FF2C6;
  --orange:#FF6B35;
  --gold:#D8B45A;
  --mist:#EAF4F0;
  --graphite:#8A9A94;
  --wine:#5A1F2E;
  --indigo:#2A1F4A;

  --line:rgba(63,242,198,.20);
  --line-soft:rgba(234,244,240,.12);
  --line-strong:rgba(63,242,198,.42);

  --r-lg:32px;
  --r-md:24px;
  --r-sm:16px;
  --r-pill:999px;

  --font-display:"HarmonyOS Sans SC","Source Han Sans SC","Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --font-body:"PingFang SC","Hiragino Sans GB","Source Han Sans SC","Noto Sans SC","Microsoft YaHei",sans-serif;
  --font-mono:"IBM Plex Mono","Roboto Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;

  --top-h:92px;
  --shadow-isle:0 22px 48px -24px rgba(0,0,0,.92);
  --shadow-card:0 26px 60px -34px rgba(0,0,0,.95);
  --ease:cubic-bezier(.22,.68,.28,1);
}

body{
  min-height:100vh;
  overflow-x:hidden;
  font-family:var(--font-body);
  font-size:clamp(15px,.62vw + 13px,17px);
  line-height:1.75;
  letter-spacing:.012em;
  color:var(--mist);
  background-color:var(--ink);
  background-image:
    radial-gradient(120% 78% at 84% -12%,rgba(63,242,198,.12),transparent 62%),
    radial-gradient(78% 62% at 6% 2%,rgba(42,31,74,.62),transparent 70%),
    linear-gradient(178deg,#0B1F1A 0%,#111614 54%,#0B1F1A 100%);
  background-attachment:fixed;
  text-rendering:optimizeLegibility;
}

::selection{ background:var(--cyan); color:#08211B; }

h1,h2,h3,h4{
  font-family:var(--font-display);
  font-weight:900;
  line-height:1.08;
  letter-spacing:-.028em;
  text-wrap:balance;
}

p{ text-wrap:pretty; }

:focus-visible{
  outline:2px solid var(--cyan);
  outline-offset:3px;
  border-radius:8px;
}

/* ---------------- 跳转链接 ---------------- */
.skip-link{
  position:fixed;
  top:12px;
  left:12px;
  z-index:200;
  padding:12px 22px;
  border-radius:var(--r-pill);
  background:var(--cyan);
  color:#08211B;
  font-weight:800;
  font-size:14px;
  text-decoration:none;
  transform:translateY(-180%);
  transition:transform .18s var(--ease);
}
.skip-link:focus,
.skip-link:focus-visible{ transform:translateY(0); }

/* ============================================================
   头部：固定浮岛层
   ============================================================ */
.stand-top{
  position:fixed;
  inset:0 0 auto 0;
  z-index:80;
  padding:clamp(10px,1.3vw,18px) clamp(12px,2.6vw,36px);
  pointer-events:none;
}

.stand-top__glow{
  position:absolute;
  top:-140px;
  left:50%;
  width:min(1080px,120%);
  height:300px;
  transform:translateX(-50%);
  pointer-events:none;
  background:
    radial-gradient(58% 100% at 50% 100%,rgba(63,242,198,.20),transparent 72%),
    radial-gradient(40% 90% at 82% 100%,rgba(255,107,53,.14),transparent 74%),
    radial-gradient(46% 80% at 14% 100%,rgba(216,180,90,.10),transparent 76%);
  filter:blur(6px);
  opacity:.85;
}

.stand-top__inner{
  position:relative;
  width:min(1440px,100%);
  margin-inline:auto;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:clamp(10px,1.6vw,22px);
  pointer-events:none;
}

.stand-brand,
.nav-isle,
.nav-toggle{ pointer-events:auto; }

/* 品牌芯片浮岛 */
.stand-brand{
  display:inline-flex;
  align-items:center;
  gap:12px;
  padding:9px 20px 9px 10px;
  border-radius:var(--r-pill);
  border:1px solid rgba(63,242,198,.24);
  background:linear-gradient(135deg,rgba(20,53,44,.94),rgba(11,31,26,.86));
  box-shadow:var(--shadow-isle);
  backdrop-filter:blur(16px) saturate(150%);
  -webkit-backdrop-filter:blur(16px) saturate(150%);
  text-decoration:none;
  color:var(--mist);
  transition:border-color .2s var(--ease),transform .2s var(--ease);
}
.stand-brand:hover{ border-color:var(--line-strong); transform:translateY(-1px); }

.stand-brand__mark{
  position:relative;
  flex:0 0 40px;
  width:40px;
  height:40px;
  border-radius:50%;
  overflow:hidden;
  border:1px solid rgba(216,180,90,.5);
  background:
    repeating-linear-gradient(96deg,rgba(63,242,198,.34) 0 2px,transparent 2px 7px),
    radial-gradient(circle at 28% 20%,rgba(255,107,53,.9),rgba(255,107,53,0) 58%),
    linear-gradient(160deg,#14352C,#0B1F1A 72%);
  box-shadow:inset 0 0 16px rgba(63,242,198,.3);
}

.stand-brand__seam{
  position:absolute;
  inset:auto 0 32% 0;
  height:2px;
  background:var(--cyan);
  opacity:.85;
}

.stand-brand__text{
  display:flex;
  flex-direction:column;
  line-height:1.15;
}

.stand-brand__name{
  font-family:var(--font-display);
  font-weight:900;
  font-size:17px;
  letter-spacing:-.02em;
}

.stand-brand__note{
  margin-top:3px;
  font-size:11.5px;
  letter-spacing:.16em;
  color:var(--graphite);
}

/* 导航浮岛 */
.nav-isle{
  display:flex;
  align-items:center;
  gap:6px;
  padding:8px 8px 8px 12px;
  border-radius:var(--r-pill);
  border:1px solid var(--line-soft);
  background:rgba(17,22,20,.74);
  box-shadow:var(--shadow-isle);
  backdrop-filter:blur(20px) saturate(160%);
  -webkit-backdrop-filter:blur(20px) saturate(160%);
}

.nav-track{
  display:flex;
  align-items:center;
  gap:2px;
}

.nav-link{
  display:inline-flex;
  align-items:center;
  padding:9px 14px;
  border-radius:var(--r-pill);
  font-size:14px;
  font-weight:600;
  letter-spacing:.01em;
  color:var(--mist);
  text-decoration:none;
  white-space:nowrap;
  transition:color .18s var(--ease),background-color .18s var(--ease);
}
.nav-link:hover{ color:var(--cyan); background:rgba(63,242,198,.09); }
.nav-link[aria-current="page"]{
  background:var(--cyan);
  color:#08211B;
  font-weight:800;
  box-shadow:0 8px 20px -12px rgba(63,242,198,.95);
}

.nav-side{
  display:flex;
  align-items:center;
  gap:6px;
  padding-left:10px;
  border-left:1px solid var(--line-soft);
}

.nav-utility{
  padding:7px 9px;
  border-radius:var(--r-pill);
  font-size:12.5px;
  color:var(--graphite);
  text-decoration:none;
  white-space:nowrap;
  transition:color .18s var(--ease),background-color .18s var(--ease);
}
.nav-utility:hover{ color:var(--mist); background:rgba(234,244,240,.07); }

.nav-cta{
  display:inline-flex;
  align-items:center;
  gap:7px;
  padding:10px 20px;
  border-radius:var(--r-pill);
  background:linear-gradient(135deg,var(--orange),#E2542A);
  color:#1A0B06;
  font-weight:800;
  font-size:14px;
  letter-spacing:.02em;
  text-decoration:none;
  white-space:nowrap;
  box-shadow:0 14px 28px -16px rgba(255,107,53,.95);
  transition:transform .18s var(--ease),box-shadow .18s var(--ease);
}
.nav-cta::after{ content:"→"; font-family:var(--font-mono); font-size:13px; }
.nav-cta:hover{ transform:translateY(-2px); box-shadow:0 18px 34px -16px rgba(255,107,53,1); }

/* 移动端菜单按钮 */
.nav-toggle{
  display:none;
  position:fixed;
  right:16px;
  bottom:calc(18px + env(safe-area-inset-bottom));
  z-index:95;
  align-items:center;
  gap:9px;
  height:52px;
  padding:0 20px 0 18px;
  border-radius:var(--r-pill);
  background:var(--cyan);
  color:#08211B;
  font-size:13.5px;
  font-weight:800;
  letter-spacing:.06em;
  cursor:pointer;
  box-shadow:0 20px 38px -18px rgba(0,0,0,.95);
}

.nav-toggle__bars{
  position:relative;
  display:block;
  width:18px;
  height:2px;
  border-radius:2px;
  background:currentColor;
  transition:background-color .18s var(--ease);
}
.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);
}
.nav-toggle__bars::before{ top:-6px; }
.nav-toggle__bars::after{ top:6px; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars{ background:transparent; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before{ transform:translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after{ transform:translateY(-6px) rotate(-45deg); }

.nav-toggle__label{ line-height:1; }

/* ============================================================
   页脚：看台围栏
   ============================================================ */
.stand-footer{
  position:relative;
  margin-top:clamp(56px,9vw,120px);
  border-top:1px solid var(--line);
  background:
    radial-gradient(92% 120% at 88% 0%,rgba(42,31,74,.62),transparent 64%),
    radial-gradient(70% 100% at 4% 0%,rgba(90,31,46,.36),transparent 66%),
    linear-gradient(180deg,#0E1512 0%,#111614 62%,#0B1F1A 100%);
  color:var(--mist);
  overflow:hidden;
}
.stand-footer::before{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background:repeating-linear-gradient(114deg,rgba(63,242,198,.055) 0 1px,transparent 1px 24px);
  opacity:.7;
}

/* 顶部数据条带 */
.rail-strip{
  position:relative;
  border-bottom:1px solid var(--line-soft);
  background:linear-gradient(90deg,rgba(63,242,198,.08),rgba(255,107,53,.06) 48%,rgba(216,180,90,.08));
}
.rail-strip__inner{
  width:min(1280px,100%);
  margin-inline:auto;
  padding:14px clamp(16px,4vw,40px);
  display:flex;
  align-items:center;
  gap:10px;
  overflow-x:auto;
  scrollbar-width:none;
}
.rail-strip__inner::-webkit-scrollbar{ display:none; }

.rail-strip__chip{
  flex:0 0 auto;
  padding:6px 14px;
  border-radius:var(--r-pill);
  border:1px solid var(--line-soft);
  background:rgba(11,31,26,.6);
  font-size:12.5px;
  font-weight:600;
  letter-spacing:.05em;
  color:var(--mist);
  white-space:nowrap;
}
.rail-strip__chip--cyan{ border-color:rgba(63,242,198,.5); color:var(--cyan); }
.rail-strip__chip--gold{ border-color:rgba(216,180,90,.55); color:var(--gold); }

.rail-strip__tick{
  flex:0 0 auto;
  margin-left:auto;
  padding-left:14px;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.14em;
  color:var(--graphite);
  white-space:nowrap;
}

/* 页脚主体 */
.foot-inner{
  position:relative;
  width:min(1280px,100%);
  margin-inline:auto;
  padding:clamp(30px,4vw,58px) clamp(16px,4vw,40px) clamp(18px,2.4vw,30px);
  display:grid;
  grid-template-columns:minmax(220px,1.7fr) repeat(3,minmax(110px,1fr)) minmax(210px,1.35fr);
  gap:clamp(24px,3vw,48px);
}

.foot-brand{ display:flex; flex-direction:column; align-items:flex-start; gap:12px; }

.foot-brand__name{
  font-family:var(--font-display);
  font-size:clamp(22px,2.2vw,28px);
  font-weight:900;
  letter-spacing:-.03em;
  line-height:1.1;
}

.foot-brand__summary{
  max-width:22ch;
  font-size:14px;
  line-height:1.7;
  color:var(--graphite);
}

.foot-seal{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:7px 16px;
  border-radius:var(--r-pill);
  border:1px dashed rgba(216,180,90,.65);
  color:var(--gold);
  font-size:12px;
  font-weight:700;
  letter-spacing:.1em;
}
.foot-seal::before{
  content:"";
  width:7px;
  height:7px;
  border-radius:50%;
  background:var(--gold);
  box-shadow:0 0 12px rgba(216,180,90,.9);
}

.foot-col{
  display:flex;
  flex-direction:column;
  gap:9px;
  min-width:0;
}

.foot-col__title{
  display:flex;
  align-items:center;
  gap:8px;
  margin-bottom:3px;
  font-size:12px;
  font-weight:800;
  letter-spacing:.2em;
  color:var(--cyan);
}
.foot-col__title::before{
  content:"";
  width:14px;
  height:2px;
  background:var(--orange);
  border-radius:2px;
}

.foot-link{
  align-self:flex-start;
  font-size:14.5px;
  color:rgba(234,244,240,.82);
  text-decoration:none;
  border-bottom:1px solid transparent;
  transition:color .18s var(--ease),border-color .18s var(--ease);
}
.foot-link:hover{ color:var(--cyan); border-color:var(--line-strong); }
.foot-link--strong{
  font-weight:800;
  color:var(--mist);
  letter-spacing:.02em;
}

.foot-contact{ gap:8px; }

.foot-meta{
  display:flex;
  align-items:baseline;
  gap:8px;
  font-size:12.5px;
  line-height:1.6;
  color:var(--graphite);
  word-break:break-word;
}

.foot-meta__key{
  flex:0 0 auto;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.1em;
  color:rgba(63,242,198,.75);
}

.foot-meta__val{
  font-family:var(--font-mono);
  font-size:12.5px;
  letter-spacing:.01em;
  color:rgba(234,244,240,.86);
}

/* 页脚底栏 */
.foot-bottom{
  position:relative;
  width:min(1280px,100%);
  margin-inline:auto;
  padding:16px clamp(16px,4vw,40px) clamp(28px,4vw,44px);
  display:flex;
  align-items:center;
  flex-wrap:wrap;
  gap:10px 22px;
  border-top:1px solid var(--line-soft);
}

.foot-legal,
.foot-copy{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.06em;
  color:var(--graphite);
}
.foot-copy{ margin-left:auto; }

/* 返回顶部浮标 */
.to-top{
  position:fixed;
  right:clamp(14px,3vw,36px);
  bottom:clamp(18px,3vw,32px);
  z-index:90;
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:11px 18px;
  border-radius:var(--r-pill);
  border:1px solid var(--line-strong);
  background:rgba(20,53,44,.94);
  color:var(--cyan);
  font-size:12.5px;
  font-weight:800;
  letter-spacing:.08em;
  cursor:pointer;
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  opacity:0;
  visibility:hidden;
  transform:translateY(12px);
  transition:opacity .22s var(--ease),transform .22s var(--ease),visibility .22s,background-color .18s var(--ease);
}
.to-top[data-visible="true"]{ opacity:1; visibility:visible; transform:none; }
.to-top:hover{ background:rgba(63,242,198,.16); }

/* ============================================================
   通用组件
   ============================================================ */
.wrap{
  width:min(1240px,100%);
  margin-inline:auto;
  padding-inline:clamp(16px,4vw,40px);
}
.wrap--narrow{ max-width:820px; }

.page-top{
  height:clamp(94px,11vw,132px);
}
.page-top--short{ height:clamp(78px,8vw,104px); }

.breadcrumbs{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-size:13px;
  color:var(--graphite);
}
.breadcrumbs a{
  color:var(--mist);
  text-decoration:none;
  border-bottom:1px solid rgba(63,242,198,.3);
  padding-bottom:1px;
  transition:color .18s var(--ease),border-color .18s var(--ease);
}
.breadcrumbs a:hover{ color:var(--cyan); border-color:var(--cyan); }
.breadcrumbs__sep{ color:rgba(138,154,148,.65); font-family:var(--font-mono); }

.btn{
  display:inline-flex;
  align-items:center;
  gap:10px;
  padding:13px 24px;
  border-radius:var(--r-pill);
  border:1px solid transparent;
  font-family:var(--font-body);
  font-size:15px;
  font-weight:800;
  letter-spacing:.03em;
  text-decoration:none;
  cursor:pointer;
  transition:transform .18s var(--ease),background-color .18s var(--ease),border-color .18s var(--ease),color .18s var(--ease);
}
.btn--primary{
  background:linear-gradient(135deg,var(--orange),#E2542A);
  color:#1A0B06;
  box-shadow:0 16px 32px -18px rgba(255,107,53,.95);
}
.btn--primary:hover{ transform:translateY(-2px); }
.btn--ghost{
  border-color:var(--line-strong);
  background:rgba(63,242,198,.07);
  color:var(--cyan);
}
.btn--ghost:hover{ background:rgba(63,242,198,.15); transform:translateY(-2px); }

.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-family:var(--font-mono);
  font-size:11.5px;
  font-weight:700;
  letter-spacing:.24em;
  color:var(--cyan);
}
.eyebrow::before{
  content:"";
  width:18px;
  height:2px;
  background:var(--orange);
  border-radius:2px;
}

.data-num{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  letter-spacing:.01em;
  color:var(--mist);
}
.data-num--up{ color:var(--orange); }
.data-num--top{ color:var(--gold); }

/* 图片容器基础规则（页面阶段放 img） */
.media{
  position:relative;
  isolation:isolate;
  overflow:hidden;
  border-radius:var(--r-lg);
  border:1px solid hsla(165,72%,60%,.16);
  background:
    radial-gradient(90% 80% at 78% 6%,rgba(63,242,198,.22),transparent 62%),
    radial-gradient(70% 90% at 12% 96%,rgba(255,107,53,.18),transparent 66%),
    linear-gradient(160deg,#14352C,#0B1F1A 58%,#2A1F4A);
}
.media::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background:repeating-linear-gradient(112deg,rgba(63,242,198,.07) 0 1px,transparent 1px 26px);
}
.media__img{
  width:100%;
  height:100%;
  object-fit:cover;
  display:block;
}
.media--wide{ aspect-ratio:16/9; }
.media--tall{ aspect-ratio:3/4; }
.media--square{ aspect-ratio:1/1; }

/* 滚动进度条（脚本注入） */
.scroll-progress{
  position:fixed;
  top:0;
  left:0;
  right:0;
  height:3px;
  z-index:120;
  background:rgba(234,244,240,.07);
  pointer-events:none;
}
.scroll-progress__fill{
  height:100%;
  width:100%;
  transform:scaleX(0);
  transform-origin:0 50%;
  background:linear-gradient(90deg,var(--cyan),var(--orange) 68%,var(--gold));
}

/* 显现动效 */
[data-reveal]{
  opacity:0;
  transform:translateY(18px);
  transition:opacity .5s var(--ease),transform .5s var(--ease);
}
[data-reveal].is-in{
  opacity:1;
  transform:none;
}

/* ============================================================
   响应式
   ============================================================ */
@media (max-width:1240px){
  .nav-link{ padding:9px 11px; font-size:13.5px; }
  .stand-brand__note{ display:none; }
}

@media (max-width:1120px){
  .nav-utility{ display:none; }
  .nav-side{ padding-left:6px; }
  .foot-inner{
    grid-template-columns:repeat(3,minmax(0,1fr));
    gap:clamp(22px,3.4vw,40px);
  }
  .foot-brand{ grid-column:1 / -1; }
  .foot-contact{ grid-column:1 / -1; }
}

@media (max-width:980px){
  :root{ --top-h:84px; }

  .stand-top{ padding:10px 12px; }
  .stand-top__inner{ align-items:flex-start; }

  .stand-brand{ padding:8px 16px 8px 8px; }
  .stand-brand__mark{ flex-basis:34px; width:34px; height:34px; }
  .stand-brand__name{ font-size:15.5px; }

  .nav-toggle{ display:inline-flex; }

  .nav-isle{
    position:fixed;
    left:12px;
    right:12px;
    bottom:calc(84px + env(safe-area-inset-bottom));
    max-height:70vh;
    overflow-y:auto;
    flex-direction:column;
    align-items:stretch;
    gap:12px;
    padding:14px;
    border-radius:26px;
    border-color:rgba(63,242,198,.28);
    background:rgba(11,31,26,.97);
    box-shadow:var(--shadow-isle);
    opacity:0;
    visibility:hidden;
    transform:translateY(140%);
    transition:transform .3s var(--ease),opacity .24s var(--ease),visibility .3s;
  }
  .nav-isle[data-open="true"]{
    opacity:1;
    visibility:visible;
    transform:translateY(0);
  }

  .nav-track{
    flex-direction:column;
    align-items:stretch;
    gap:4px;
    overflow-x:auto;
  }
  .nav-link{
    justify-content:space-between;
    padding:13px 16px;
    font-size:16px;
    border-radius:16px;
  }
  .nav-link::after{
    content:"↗";
    font-family:var(--font-mono);
    font-size:12px;
    opacity:.55;
  }
  .nav-link[aria-current="page"]::after{ opacity:1; }

  .nav-side{
    display:flex;
    flex-wrap:wrap;
    align-items:center;
    gap:10px;
    padding:12px 0 0;
    border-left:0;
    border-top:1px solid var(--line-soft);
  }
  .nav-utility{
    display:inline-flex;
    font-size:13px;
    padding:8px 12px;
    border:1px solid var(--line-soft);
    border-radius:var(--r-pill);
  }
  .nav-cta{ flex:1 1 auto; justify-content:center; padding:13px 20px; font-size:15px; }

  .to-top{
    right:16px;
    bottom:calc(84px + env(safe-area-inset-bottom));
  }

  .foot-inner{ padding-top:34px; }
}

@media (max-width:640px){
  body{ font-size:15px; line-height:1.72; }

  .foot-inner{
    grid-template-columns:repeat(2,minmax(0,1fr));
    gap:24px;
  }
  .foot-brand__summary{ max-width:none; }

  .foot-bottom{
    flex-direction:column;
    align-items:flex-start;
    gap:8px;
    padding-bottom:96px;
  }
  .foot-copy{ margin-left:0; }

  .rail-strip__tick{ display:none; }

  .media{ border-radius:var(--r-md); }
  .media--tall{ aspect-ratio:4/5; }
}

@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;
  }
  [data-reveal]{ opacity:1; transform:none; }
}