/* ============================================================
   爱体育官网 · /assets/site.css
   夜赛墨绿底 / 荧光青状态 / 信号橙重点 / 暖白缓冲
   ============================================================ */

/* ---------- 0. 设计变量 ---------- */
:root{
  --ink:#061C16;
  --ink-soft:#0B2A22;
  --cyan:#19E3C2;
  --orange:#FF6A2B;
  --paper:#F3EFE3;
  --mist:#A7C1B6;
  --navy:#123B4A;
  --gold:#E8C56A;
  --alert:#FF5A66;

  --paper-70:rgba(243,239,227,.72);
  --paper-50:rgba(243,239,227,.52);
  --line:rgba(167,193,182,.20);
  --line-strong:rgba(167,193,182,.44);
  --cyan-a10:rgba(25,227,194,.10);
  --cyan-a16:rgba(25,227,194,.16);
  --orange-a14:rgba(255,106,43,.14);

  --font-display:"Source Han Sans HW","Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --font-serif:"Source Han Serif SC","Noto Serif SC","Songti SC","SimSun",Georgia,serif;
  --font-body:"Source Han Sans SC","Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --font-mono:"JetBrains Mono","IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;

  --rail-w:268px;
  --shell-max:1180px;
  --ease:cubic-bezier(.22,.61,.36,1);
  --radius-a:26px 6px 26px 6px;
  --radius-b:6px 26px 6px 26px;
}

/* ---------- 1. reset ---------- */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body,h1,h2,h3,h4,h5,p,ul,ol,figure,blockquote,dl,dd,fieldset{margin:0;}
ul,ol{padding:0;list-style:none;}
img,svg,video{max-width:100%;}
button,input,select,textarea{font:inherit;color:inherit;}
a{color:inherit;}
table{border-collapse:collapse;}

/* ---------- 2. 基础排版 ---------- */
body{
  min-height:100vh;
  padding-left:var(--rail-w);
  background-color:var(--ink);
  background-image:
    linear-gradient(rgba(167,193,182,.05) 1px,transparent 1px),
    linear-gradient(90deg,rgba(167,193,182,.05) 1px,transparent 1px);
  background-size:80px 80px;
  background-attachment:fixed;
  color:var(--paper);
  font-family:var(--font-body);
  font-size:17px;
  font-weight:400;
  line-height:1.8;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

h1,h2,h3,h4{
  font-family:var(--font-display);
  font-weight:900;
  line-height:1.08;
  letter-spacing:-.02em;
  color:var(--paper);
}

::selection{background:var(--cyan);color:var(--ink);}

:focus-visible{
  outline:2px solid var(--cyan);
  outline-offset:3px;
  border-radius:4px;
}

/* ---------- 3. 布局工具 ---------- */
.shell{
  width:100%;
  max-width:var(--shell-max);
  margin:0 auto;
  padding:0 clamp(18px,4vw,48px);
}

.site-main{
  display:block;
  position:relative;
  z-index:1;
  padding-top:clamp(22px,3vw,44px);
  padding-bottom:clamp(46px,6vw,86px);
}

.grid{display:grid;gap:clamp(18px,3vw,34px);}
.grid--7-5{grid-template-columns:7fr 5fr;}
.grid--8-4{grid-template-columns:8fr 4fr;}
.grid--5-7{grid-template-columns:5fr 7fr;}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr));}

.section-head{
  display:flex;
  flex-wrap:wrap;
  align-items:flex-end;
  justify-content:space-between;
  gap:14px 24px;
  margin-bottom:clamp(20px,3vw,34px);
}
.section-title{
  font-family:var(--font-display);
  font-weight:900;
  font-size:clamp(26px,3.6vw,44px);
  line-height:1.06;
  letter-spacing:-.025em;
}
.kicker{
  display:inline-flex;
  align-items:center;
  gap:.65em;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--cyan);
}
.kicker::before{
  content:"";
  display:block;
  width:20px;
  height:1px;
  background:var(--cyan);
}

/* ---------- 4. 正文块 ---------- */
.prose{max-width:68ch;}
.prose > * + *{margin-top:1.05em;}
.prose p{color:var(--paper-70);}
.prose h2{
  font-family:var(--font-serif);
  font-weight:600;
  font-size:clamp(23px,2.8vw,32px);
  line-height:1.35;
  letter-spacing:0;
  margin-top:1.9em;
}
.prose h3{
  font-family:var(--font-serif);
  font-weight:600;
  font-size:clamp(19px,2.1vw,22px);
  line-height:1.45;
  letter-spacing:0;
  margin-top:1.5em;
  color:var(--paper);
}
.prose strong{color:var(--paper);font-weight:600;}
.prose a{color:var(--cyan);text-decoration:none;border-bottom:1px solid rgba(25,227,194,.45);}
.prose a:hover{border-bottom-color:var(--cyan);}
.prose ul,.prose ol{display:flex;flex-direction:column;gap:.55em;}
.prose ul li{position:relative;padding-left:1.15em;color:var(--paper-70);}
.prose ul li::before{
  content:"";
  position:absolute;
  left:0;
  top:.72em;
  width:7px;
  height:7px;
  border-radius:1px;
  background:var(--cyan);
}
.prose ol{counter-reset:prose-ol;}
.prose ol li{position:relative;padding-left:1.9em;color:var(--paper-70);counter-increment:prose-ol;}
.prose ol li::before{
  content:counter(prose-ol,decimal-leading-zero);
  position:absolute;
  left:0;
  top:.1em;
  font-family:var(--font-mono);
  font-size:.78em;
  color:var(--orange);
}
.prose blockquote{
  border-left:2px solid var(--orange);
  padding:.2em 0 .2em 1.1em;
  font-family:var(--font-serif);
  color:var(--paper);
}

/* ---------- 5. 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:.55em;
  padding:12px 24px;
  border:1px solid transparent;
  border-radius:999px;
  font-family:var(--font-body);
  font-size:15px;
  font-weight:600;
  line-height:1.2;
  letter-spacing:.01em;
  text-decoration:none;
  cursor:pointer;
  transition:transform .22s var(--ease),background-color .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.btn:hover{transform:translateY(-2px);}
.btn:active{transform:translateY(0);}
.btn--primary{background:var(--cyan);color:var(--ink);box-shadow:0 10px 30px -16px rgba(25,227,194,.9);}
.btn--primary:hover{background:var(--paper);}
.btn--accent{background:var(--orange);color:var(--ink);box-shadow:0 10px 30px -16px rgba(255,106,43,.95);}
.btn--accent:hover{background:var(--gold);}
.btn--ghost{background:transparent;color:var(--paper);border-color:var(--line-strong);}
.btn--ghost:hover{border-color:var(--cyan);color:var(--cyan);}
.btn--paper{background:var(--paper);color:var(--ink);}
.btn--paper:hover{background:var(--cyan);}

/* ---------- 6. 面包屑 ---------- */
.breadcrumbs{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:.5em;
  padding:12px 0 18px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.14em;
  color:var(--mist);
}
.breadcrumbs a{
  text-decoration:none;
  color:var(--mist);
  border-bottom:1px solid transparent;
  transition:color .2s var(--ease),border-color .2s var(--ease);
}
.breadcrumbs a:hover{color:var(--cyan);border-bottom-color:var(--cyan);}
.breadcrumbs__sep{opacity:.45;}
.breadcrumbs [aria-current="page"]{color:var(--paper);}

/* ---------- 7. 图片容器基座 ---------- */
.media-frame{
  position:relative;
  display:block;
  overflow:hidden;
  isolation:isolate;
  border-radius:var(--radius-a);
  border:1px solid var(--line);
  background:
    radial-gradient(circle at 20% 12%,var(--cyan-a16),transparent 55%),
    radial-gradient(circle at 84% 82%,var(--orange-a14),transparent 52%),
    var(--navy);
}
.media-frame::before{
  content:"";
  position:absolute;
  inset:0;
  z-index:2;
  pointer-events:none;
  background-image:
    linear-gradient(rgba(25,227,194,.14) 1px,transparent 1px),
    linear-gradient(90deg,rgba(25,227,194,.14) 1px,transparent 1px);
  background-size:56px 56px;
  opacity:.55;
  mix-blend-mode:screen;
}
.media-frame > img,
.media-frame > video{
  display:block;
  width:100%;
  height:100%;
  object-fit:cover;
}
.media-frame--banner{aspect-ratio:21/9;}
.media-frame--wide{aspect-ratio:16/9;}
.media-frame--tall{aspect-ratio:4/5;}
.media-frame--square{aspect-ratio:1/1;}
.media-frame--auto{aspect-ratio:auto;}

.media-frame__ph{
  position:absolute;
  inset:0;
  display:flex;
  align-items:center;
  justify-content:center;
  padding:18px;
  text-align:center;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.1em;
  color:var(--mist);
}
.media-frame__tag{
  position:absolute;
  z-index:3;
  left:14px;
  bottom:14px;
  padding:5px 12px;
  border-radius:999px;
  border:1px solid rgba(25,227,194,.42);
  background:rgba(6,28,22,.84);
  color:var(--cyan);
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.14em;
}

/* ---------- 8. 跳转链接 ---------- */
.skip-link{
  position:fixed;
  top:-72px;
  left:14px;
  z-index:300;
  padding:11px 20px;
  border-radius:0 0 14px 14px;
  background:var(--cyan);
  color:var(--ink);
  font-size:14px;
  font-weight:700;
  text-decoration:none;
  transition:top .22s var(--ease);
}
.skip-link:focus{top:0;}

/* ---------- 9. 页头 · 桌面侧轨 ---------- */
.site-header{
  position:fixed;
  top:0;
  left:0;
  bottom:0;
  width:var(--rail-w);
  z-index:100;
  display:flex;
  flex-direction:column;
  gap:20px;
  padding:26px 20px 22px;
  background:linear-gradient(180deg,var(--ink-soft) 0%,var(--ink) 100%);
  border-right:1px solid var(--line);
}

/* 品牌 */
.brand{
  display:flex;
  flex-direction:column;
  gap:3px;
  text-decoration:none;
  color:var(--paper);
}
.brand__coord{
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.16em;
  color:var(--cyan);
  opacity:.9;
}
.brand__name{
  font-family:var(--font-display);
  font-weight:900;
  font-size:27px;
  line-height:1.04;
  letter-spacing:-.03em;
}
.brand__line{
  font-family:var(--font-serif);
  font-size:12px;
  letter-spacing:.1em;
  color:var(--mist);
}

/* 18 点状态条 */
.header-status{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:5px 9px;
  padding:9px 12px;
  border:1px solid var(--line);
  border-left:2px solid var(--cyan);
  border-radius:0 12px 12px 0;
  background:rgba(18,59,74,.38);
  font-size:12px;
  line-height:1.45;
}
.header-status__dot{
  flex:0 0 auto;
  width:7px;
  height:7px;
  border-radius:50%;
  background:var(--cyan);
  animation:status-pulse 2.8s var(--ease) infinite;
}
.header-status__text{color:var(--paper);}
.header-status__meta{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.04em;
  color:var(--gold);
  font-variant-numeric:tabular-nums;
}
@keyframes status-pulse{
  0%,100%{box-shadow:0 0 0 0 rgba(25,227,194,.55);}
  55%{box-shadow:0 0 0 7px rgba(25,227,194,0);}
}

/* 移动抽屉按钮 */
.nav-toggle{
  display:none;
  align-items:center;
  gap:8px;
  padding:9px 14px;
  border:1px solid rgba(25,227,194,.45);
  border-radius:999px;
  background:var(--cyan-a10);
  color:var(--cyan);
  font-size:13px;
  font-weight:600;
  cursor:pointer;
}
.nav-toggle__bars{
  display:flex;
  flex-direction:column;
  justify-content:center;
  gap:3px;
  width:16px;
}
.nav-toggle__bars span{
  display:block;
  height:1.5px;
  border-radius:2px;
  background:currentColor;
  transition:transform .25s var(--ease),opacity .2s var(--ease);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(1){transform:translateY(4.5px) rotate(45deg);}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(2){opacity:0;}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(3){transform:translateY(-4.5px) rotate(-45deg);}

/* 侧轨导航 */
.nav-rail{
  display:flex;
  flex-direction:column;
  gap:14px;
  flex:1 1 auto;
  min-height:0;
}
.nav-rail__index{
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.2em;
  color:var(--mist);
  text-transform:uppercase;
}
.nav-rail__list{
  display:flex;
  flex-direction:column;
  gap:2px;
  overflow-y:auto;
  padding-right:4px;
}
.nav-rail__item{display:block;}
.nav-rail__link{
  display:flex;
  align-items:baseline;
  gap:10px;
  padding:10px 10px 10px 12px;
  border-left:2px solid transparent;
  border-radius:0 10px 10px 0;
  color:var(--mist);
  font-size:15px;
  text-decoration:none;
  transition:color .22s var(--ease),background-color .22s var(--ease),border-color .22s var(--ease);
}
.nav-rail__num{
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.08em;
  opacity:.55;
}
.nav-rail__label{display:block;}
.nav-rail__link:hover{
  color:var(--paper);
  border-left-color:var(--line-strong);
  background:var(--cyan-a10);
}
.nav-rail__link[aria-current="page"]{
  color:var(--ink);
  background:var(--cyan);
  border-left-color:var(--orange);
  font-weight:600;
}
.nav-rail__link[aria-current="page"] .nav-rail__num{opacity:.65;color:var(--ink);}
.nav-rail__foot{
  margin-top:auto;
  padding-top:14px;
  border-top:1px solid var(--line);
  display:flex;
  flex-direction:column;
  gap:10px;
}
.nav-rail__note{
  font-family:var(--font-mono);
  font-size:11px;
  line-height:1.7;
  letter-spacing:.02em;
  color:var(--paper-50);
}
.nav-rail__cta{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  align-self:flex-start;
  padding:9px 18px;
  border-radius:999px;
  background:var(--orange);
  color:var(--ink);
  font-size:13px;
  font-weight:700;
  text-decoration:none;
  transition:background-color .22s var(--ease),transform .22s var(--ease);
}
.nav-rail__cta:hover{background:var(--paper);transform:translateY(-2px);}

/* ---------- 10. 悬浮工具条 ---------- */
.float-dock{
  position:fixed;
  right:0;
  top:50%;
  transform:translateY(-50%);
  z-index:70;
  display:flex;
  flex-direction:column;
  gap:6px;
  padding:8px 0;
}
.dock-link{
  display:flex;
  align-items:center;
  gap:8px;
  padding:10px 16px 10px 14px;
  border:1px solid var(--line-strong);
  border-right:none;
  border-radius:999px 0 0 999px;
  background:rgba(11,42,34,.94);
  color:var(--paper);
  font-size:12.5px;
  line-height:1.2;
  text-decoration:none;
  transition:background-color .22s var(--ease),color .22s var(--ease),padding-left .22s var(--ease);
}
.dock-link:hover{
  background:var(--cyan);
  color:var(--ink);
  padding-left:20px;
}
.dock-link__icon{font-size:13px;line-height:1;color:var(--cyan);}
.dock-link:hover .dock-link__icon{color:var(--ink);}
.dock-link__label{white-space:nowrap;}
.dock-link--accent{
  background:var(--orange);
  color:var(--ink);
  border-color:var(--orange);
  font-weight:700;
}
.dock-link--accent .dock-link__icon{color:var(--ink);}
.dock-link--accent:hover{background:var(--gold);border-color:var(--gold);}

/* ---------- 11. 页脚 ---------- */
.site-footer{
  position:relative;
  z-index:1;
  margin-top:clamp(56px,8vw,110px);
  padding:clamp(40px,5vw,70px) clamp(18px,4vw,48px) 26px;
  background:linear-gradient(180deg,rgba(11,42,34,.96) 0%,var(--ink) 82%);
  border-top:1px solid var(--line);
}
.footer-main{
  display:grid;
  grid-template-columns:1.4fr .9fr 1.5fr .9fr;
  gap:clamp(22px,3vw,42px);
  max-width:var(--shell-max);
  margin:0 auto;
}
.footer-brand{display:flex;flex-direction:column;gap:4px;}
.footer-brand__coord{
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.16em;
  color:var(--cyan);
}
.footer-brand__name{
  font-family:var(--font-display);
  font-weight:900;
  font-size:clamp(24px,2.6vw,32px);
  line-height:1.1;
  letter-spacing:-.025em;
  color:var(--paper);
}
.footer-brand__desc{
  margin-top:6px;
  max-width:30ch;
  font-size:14px;
  line-height:1.75;
  color:var(--paper-50);
}
.footer-col{display:flex;flex-direction:column;}
.footer-col__title{
  margin-bottom:12px;
  padding-bottom:8px;
  border-bottom:1px solid var(--line);
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:500;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--mist);
}
.footer-col__list{display:flex;flex-direction:column;gap:9px;}
.footer-col__list--contact{gap:11px;}
.footer-link{
  align-self:flex-start;
  font-size:14px;
  color:var(--paper-70);
  text-decoration:none;
  border-bottom:1px solid transparent;
  transition:color .2s var(--ease),border-color .2s var(--ease);
}
.footer-link:hover{color:var(--cyan);border-bottom-color:var(--cyan);}
.footer-contact-line{
  font-size:13.5px;
  line-height:1.7;
  color:var(--paper-70);
  overflow-wrap:anywhere;
}
.footer-note{
  max-width:var(--shell-max);
  margin:clamp(26px,3.5vw,44px) auto 0;
  padding-top:18px;
  border-top:1px solid var(--line);
  font-size:13px;
  line-height:1.8;
  color:var(--paper-50);
}
.footer-legal{
  max-width:var(--shell-max);
  margin:14px auto 0;
  display:flex;
  flex-wrap:wrap;
  justify-content:space-between;
  gap:8px 20px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.06em;
  color:var(--mist);
}
.footer-legal__copy,
.footer-legal__icp{margin:0;}

/* ---------- 12. 滚动进度 ---------- */
.scroll-meter{
  position:fixed;
  top:0;
  left:0;
  right:0;
  height:2px;
  z-index:220;
  pointer-events:none;
  background:transparent;
}
.scroll-meter__bar{
  height:100%;
  width:0;
  background:linear-gradient(90deg,var(--cyan) 0%,var(--gold) 58%,var(--orange) 100%);
  transition:width .12s linear;
}

/* ---------- 13. 滚动显现 ---------- */
.js-reveal [data-reveal]{
  opacity:0;
  transform:translateY(18px);
  transition:opacity .62s var(--ease),transform .62s var(--ease);
  will-change:opacity,transform;
}
.js-reveal [data-reveal].is-visible{
  opacity:1;
  transform:none;
}

/* ---------- 14. 平板 ---------- */
@media (max-width:1100px){
  .footer-main{grid-template-columns:1fr 1fr;}
  .grid--7-5,.grid--8-4,.grid--5-7{grid-template-columns:6fr 6fr;}
}

/* ---------- 15. 移动 / 平板竖屏 ---------- */
@media (max-width:1023px){
  body{
    padding-left:0;
    padding-bottom:70px;
    background-size:56px 56px;
  }

  .site-header{
    position:sticky;
    top:0;
    left:auto;
    bottom:auto;
    width:auto;
    display:grid;
    grid-template-columns:1fr auto;
    grid-template-areas:
      "brand toggle"
      "status status";
    align-items:center;
    gap:8px 12px;
    padding:11px 16px 10px;
    background:rgba(6,28,22,.94);
    -webkit-backdrop-filter:blur(12px);
    backdrop-filter:blur(12px);
    border-right:none;
    border-bottom:1px solid var(--line);
  }

  .brand{grid-area:brand;}
  .brand__name{font-size:22px;}
  .brand__coord{font-size:9px;}
  .brand__line{font-size:11px;}

  .header-status{
    grid-area:status;
    width:100%;
    padding:6px 10px;
    border-radius:8px;
    border-left-width:1px;
    font-size:11px;
  }
  .header-status__meta{font-size:10.5px;}

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

  .nav-rail{
    position:fixed;
    inset:0;
    z-index:90;
    display:none;
    flex-direction:column;
    gap:14px;
    padding:96px 20px 130px;
    overflow-y:auto;
    background:#0A2620;
    border-right:1px solid var(--line);
  }
  .nav-rail[data-open="true"]{display:flex;}

  .nav-rail__index{
    padding-bottom:10px;
    border-bottom:1px solid var(--line);
  }
  .nav-rail__link{
    padding:15px 12px;
    font-size:18px;
    border-radius:0 12px 12px 0;
  }
  .nav-rail__num{font-size:12px;}
  .nav-rail__foot{
    margin-top:6px;
    padding-top:16px;
    border-top:1px solid var(--line);
  }
  .nav-rail__note{font-size:11.5px;}
  .nav-rail__cta{padding:12px 22px;font-size:14px;}

  .float-dock{
    top:auto;
    bottom:0;
    right:0;
    left:0;
    transform:none;
    flex-direction:row;
    gap:0;
    padding:0;
    z-index:75;
    background:rgba(11,42,34,.97);
    border-top:1px solid var(--line-strong);
  }
  .dock-link{
    flex:1 1 0;
    justify-content:center;
    padding:14px 6px;
    border:none;
    border-radius:0;
    background:transparent;
    font-size:12.5px;
  }
  .dock-link + .dock-link{border-left:1px solid var(--line);}
  .dock-link:hover{padding-left:6px;}
  .dock-link--accent{
    background:var(--orange);
    color:var(--ink);
  }

  .grid--3{grid-template-columns:1fr;}
  .footer-main{grid-template-columns:1fr;gap:26px;}
  .footer-brand__desc{max-width:44ch;}
  .footer-legal{font-size:10.5px;}
}

@media (max-width:680px){
  body{font-size:15.5px;line-height:1.8;}
  .grid--7-5,.grid--8-4,.grid--5-7{grid-template-columns:1fr;}
  .section-head{align-items:flex-start;flex-direction:column;gap:10px;}
  .btn{width:100%;}
  .footer-main{grid-template-columns:1fr;}
  .media-frame--banner{aspect-ratio:16/9;}
}

/* ---------- 16. 减少动态 ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .header-status__dot{animation:none;box-shadow:0 0 0 3px rgba(25,227,194,.22);}
  .js-reveal [data-reveal]{opacity:1;transform:none;}
  .dock-link:hover,.btn:hover,.nav-rail__cta:hover{transform:none;}
}