/* ==========================================================================
   平博体育 · 共享站点样式 /assets/site.css
   01 变量与重置 / 02 基础排版 / 03 通用组件 / 04 页头 / 05 页脚 / 06 响应式与动效
   ========================================================================== */

/* ---------- 01 变量与重置 ---------- */
:root{
  --ink-900:#0B1210;          /* 炭黑看台 */
  --ink-800:#0F2A22;          /* 深墨绿 */
  --moss:#3F5B4A;             /* 苔绿 */
  --stone:#C9C3B6;            /* 岩灰 */
  --paper:#F2EEE4;            /* 米白纸面 */
  --lime:#C8FF3D;             /* 荧光青柠绿 */
  --ember:#FF6A3D;            /* 暖橙红 */
  --clay:#A9573B;             /* 陶土 */
  --hairline:#5E6B62;         /* 精密线灰 */
  --focus:#E6FF8A;            /* 焦点黄绿 */

  --rail-w:96px;
  --bar-h:64px;
  --shell-max:1240px;
  --gutter:clamp(18px,4vw,48px);
  --stack-gap:16px;

  --font-display:"Noto Serif SC","Source Han Serif SC","Songti SC","SimSun",Georgia,serif;
  --font-sans:"Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Helvetica Neue",Arial,sans-serif;
  --font-cond:"Barlow Condensed","Oswald","Arial Narrow","Helvetica Neue",Arial,sans-serif;
  --font-mono:"IBM Plex Mono","Roboto Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;

  --ease:cubic-bezier(.2,.7,.2,1);
  --line-soft:rgba(94,107,98,.42);
  --line-strong:rgba(94,107,98,.72);
}

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

html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
  scroll-padding-top:calc(var(--bar-h) + 18px);
}

body{
  margin:0;
  padding-top:var(--bar-h);
  background-color:var(--ink-900);
  color:var(--stone);
  font-family:var(--font-sans);
  font-size:17px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}

body.is-nav-open{overflow:hidden;}

h1,h2,h3,h4,p,figure,blockquote,dl,dd{margin:0;}
ul,ol{margin:0;padding:0;}
img,svg,video{display:block;max-width:100%;height:auto;}
button{font:inherit;color:inherit;}
a{color:inherit;}
hr{border:0;height:1px;background:var(--line-soft);}

::selection{background:var(--lime);color:var(--ink-900);}

:focus-visible{outline:2px solid var(--focus);outline-offset:3px;}
a:focus:not(:focus-visible),
button:focus:not(:focus-visible){outline:none;}

/* ---------- 02 基础排版 ---------- */
h1,h2,h3{
  font-family:var(--font-display);
  font-weight:700;
  line-height:1.14;
  letter-spacing:.005em;
  color:var(--paper);
}
h1{font-size:clamp(34px,7vw,72px);line-height:1.02;}
h2{font-size:clamp(24px,3.4vw,38px);}
h3{font-size:clamp(18px,2vw,24px);line-height:1.3;}

strong{color:var(--paper);font-weight:700;}

.visually-hidden{
  position:absolute!important;
  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;
}

/* ---------- 03 通用组件 ---------- */
.container{
  width:100%;
  max-width:var(--shell-max);
  margin-inline:auto;
  padding-inline:var(--gutter);
}

.section{padding-block:clamp(44px,6vw,92px);}

.section__head{
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  justify-content:space-between;
  gap:10px 28px;
  padding-bottom:14px;
  margin-bottom:clamp(20px,3vw,36px);
  border-bottom:1px solid var(--line-soft);
}

.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-family:var(--font-cond);
  font-size:12px;
  letter-spacing:.3em;
  text-transform:uppercase;
  color:var(--stone);
}
.eyebrow::before{
  content:"";
  width:22px;height:2px;
  background:var(--lime);
  flex:none;
}

.rule{height:1px;background:linear-gradient(90deg,var(--line-strong),transparent);}

.slant-rule{
  height:2px;
  border:0;
  margin-block:clamp(24px,4vw,48px);
  background:linear-gradient(90deg,var(--lime),var(--ember) 55%,transparent);
  transform:skewY(-1deg);
  transform-origin:left center;
}

.grid{display:grid;gap:clamp(16px,2.4vw,28px);}
.grid--2{grid-template-columns:repeat(auto-fit,minmax(260px,1fr));}
.grid--3{grid-template-columns:repeat(auto-fit,minmax(212px,1fr));}

.stack{display:flex;flex-direction:column;gap:var(--stack-gap);}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:.5em;
  min-height:44px;
  padding:11px 22px;
  border:1px solid var(--line-strong);
  border-radius:0;
  background:transparent;
  color:var(--paper);
  font-family:var(--font-cond);
  font-size:14px;
  font-weight:600;
  letter-spacing:.16em;
  text-decoration:none;
  text-align:center;
  cursor:pointer;
  transition:background-color .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease),transform .22s var(--ease);
}
.btn:hover{border-color:var(--lime);color:var(--lime);}
.btn:active{transform:translateY(1px);}

.btn--primary{
  background:var(--lime);
  border-color:var(--lime);
  color:var(--ink-900);
}
.btn--primary:hover{background:#DAFF6B;border-color:#DAFF6B;color:var(--ink-900);}

.btn--ghost{border-color:var(--hairline);color:var(--paper);}
.btn--ghost:hover{border-color:var(--lime);color:var(--lime);}

.btn--quiet{
  border-color:transparent;
  padding-inline:0;
  color:var(--lime);
}
.btn--quiet:hover{color:var(--focus);}

.card{
  position:relative;
  display:flex;
  flex-direction:column;
  padding:clamp(18px,2.4vw,30px);
  border:1px solid var(--line-soft);
  border-radius:0;
  background:linear-gradient(180deg,rgba(15,42,34,.88),rgba(11,18,16,.92));
  transition:border-color .24s var(--ease),transform .24s var(--ease),box-shadow .24s var(--ease);
}
.card::after{
  content:"";
  position:absolute;
  top:-1px;left:-1px;
  width:16px;height:2px;
  background:var(--lime);
}
.card:hover{border-color:rgba(200,255,61,.55);transform:translateY(-2px);}

.card__kicker{
  font-family:var(--font-cond);
  font-size:11px;
  letter-spacing:.26em;
  text-transform:uppercase;
  color:var(--lime);
  margin-bottom:10px;
}
.card__title{
  font-family:var(--font-display);
  font-size:clamp(19px,2.2vw,25px);
  line-height:1.28;
  color:var(--paper);
}
.card__text{
  margin-top:10px;
  font-size:15px;
  line-height:1.75;
  color:var(--stone);
}
.card__meta{
  display:flex;
  flex-wrap:wrap;
  gap:8px 18px;
  margin-top:18px;
  padding-top:12px;
  border-top:1px solid var(--line-soft);
  font-family:var(--font-mono);
  font-size:12px;
  color:var(--hairline);
  letter-spacing:.02em;
}

.tag{
  display:inline-block;
  padding:3px 10px;
  border:1px solid var(--line-strong);
  border-radius:0;
  background:transparent;
  font-family:var(--font-cond);
  font-size:11px;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--stone);
}
.tag--lime{border-color:var(--lime);color:var(--lime);}
.tag--ember{border-color:var(--ember);color:var(--ember);}

.data-num{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-feature-settings:"tnum" 1;
  letter-spacing:-.01em;
  color:var(--ember);
}
.data-num--lime{color:var(--lime);}

.breadcrumb{
  font-family:var(--font-cond);
  font-size:12px;
  letter-spacing:.16em;
  color:var(--hairline);
}
.breadcrumb__list{
  list-style:none;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:6px 4px;
}
.breadcrumb__item{display:inline-flex;align-items:center;gap:8px;}
.breadcrumb__item + .breadcrumb__item::before{
  content:"／";
  color:var(--hairline);
}
.breadcrumb__item a{color:var(--stone);text-decoration:none;}
.breadcrumb__item a:hover{color:var(--lime);}
.breadcrumb__item[aria-current="page"]{color:var(--lime);}

.prose{
  max-width:68ch;
  font-size:1.0625rem;
  line-height:1.85;
  color:#CFC9BC;
}
.prose > * + *{margin-top:1.05em;}
.prose h2,.prose h3{color:var(--paper);font-family:var(--font-display);line-height:1.25;}
.prose h2{font-size:clamp(22px,2.6vw,30px);margin-top:1.8em;}
.prose h3{font-size:19px;margin-top:1.6em;}
.prose ul,.prose ol{padding-left:1.25em;}
.prose li + li{margin-top:.4em;}
.prose a{color:var(--lime);text-decoration:underline;text-underline-offset:4px;}

.prose--paper{
  max-width:none;
  background:var(--paper);
  color:#22281F;
  border:1px solid #D9D3C4;
  padding:clamp(22px,3.4vw,44px);
}
.prose--paper h2,.prose--paper h3{color:#122018;}
.prose--paper a{color:#2F5A3F;}

.media-frame{
  position:relative;
  display:block;
  width:100%;
  aspect-ratio:16 / 10;
  overflow:hidden;
  border:1px solid var(--line-soft);
  border-radius:0;
  background:
    repeating-linear-gradient(135deg,rgba(94,107,98,.14) 0 1px,transparent 1px 12px),
    linear-gradient(150deg,var(--ink-800),var(--ink-900) 65%);
}
.media-frame--wide{aspect-ratio:21 / 9;}
.media-frame--tall{aspect-ratio:3 / 4;}
.media-frame__img{
  width:100%;
  height:100%;
  object-fit:cover;
  filter:saturate(.94) contrast(1.06) brightness(.95);
}
.media-frame__caption{
  position:absolute;
  left:0;bottom:0;
  padding:8px 14px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.04em;
  color:var(--stone);
  background:rgba(11,18,16,.82);
}

/* ---------- 04 页头 ---------- */
.skip-link{
  position:fixed;
  top:8px;left:8px;
  z-index:200;
  padding:12px 18px;
  background:var(--lime);
  color:var(--ink-900);
  font-family:var(--font-cond);
  font-size:14px;
  letter-spacing:.16em;
  text-decoration:none;
  transform:translateY(-160%);
  transition:transform .22s var(--ease);
}
.skip-link:focus{transform:translateY(0);}

.site-header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:90;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  height:var(--bar-h);
  padding:0 16px;
  color:var(--paper);
  background:linear-gradient(180deg,rgba(15,42,34,.99),rgba(11,18,16,.99));
  border-bottom:1px solid var(--line-soft);
  box-shadow:0 14px 40px -32px #000;
}

.site-header::before{
  content:"";
  position:fixed;
  inset:var(--bar-h) 0 0;
  z-index:0;
  background:rgba(8,14,12,.82);
  opacity:0;
  pointer-events:none;
  transition:opacity .28s var(--ease);
}
.site-header[data-open]::before{opacity:1;pointer-events:auto;}

.brand{
  position:relative;
  z-index:3;
  display:flex;
  align-items:center;
  gap:10px;
  min-height:44px;
  text-decoration:none;
  color:inherit;
}
.brand__mark{
  display:grid;
  place-items:center;
  width:36px;height:36px;
  flex:none;
  border:1px solid var(--lime);
  background:rgba(200,255,61,.08);
  color:var(--lime);
  font-family:var(--font-display);
  font-size:18px;
  font-weight:700;
  line-height:1;
}
.brand__text{display:flex;flex-direction:column;line-height:1.15;}
.brand__name{
  font-family:var(--font-cond);
  font-size:16px;
  letter-spacing:.2em;
  color:var(--paper);
}
.brand__line{
  font-size:10px;
  letter-spacing:.1em;
  color:var(--stone);
  opacity:.85;
}

.nav-toggle{
  position:relative;
  z-index:3;
  display:inline-flex;
  align-items:center;
  gap:10px;
  min-height:44px;
  padding:8px 12px;
  border:1px solid var(--hairline);
  border-radius:0;
  background:transparent;
  color:var(--paper);
  font-family:var(--font-cond);
  font-size:12px;
  letter-spacing:.24em;
  cursor:pointer;
  transition:border-color .22s var(--ease),color .22s var(--ease);
}
.nav-toggle:hover{border-color:var(--lime);color:var(--lime);}
.nav-toggle__bars{
  position:relative;
  display:block;
  width:18px;height:2px;
  background:currentColor;
  transition:background-color .2s var(--ease);
}
.nav-toggle__bars::before,
.nav-toggle__bars::after{
  content:"";
  position:absolute;
  left:0;
  width:18px;height:2px;
  background:currentColor;
  transition:transform .26s var(--ease);
}
.nav-toggle__bars::before{top:-6px;}
.nav-toggle__bars::after{top:6px;}
.site-header[data-open] .nav-toggle{border-color:var(--lime);color:var(--lime);}
.site-header[data-open] .nav-toggle__bars{background:transparent;}
.site-header[data-open] .nav-toggle__bars::before{transform:translateY(6px) rotate(45deg);}
.site-header[data-open] .nav-toggle__bars::after{transform:translateY(-6px) rotate(-45deg);}

.site-nav{
  position:fixed;
  top:var(--bar-h);right:0;bottom:0;
  z-index:2;
  display:flex;
  flex-direction:column;
  gap:18px;
  width:min(86vw,340px);
  height:calc(100dvh - var(--bar-h));
  padding:26px 22px 34px;
  overflow-y:auto;
  overscroll-behavior:contain;
  background:linear-gradient(180deg,var(--ink-800),var(--ink-900) 72%);
  border-left:1px solid var(--line-soft);
  transform:translateX(102%);
  transition:transform .32s var(--ease);
}
.site-header[data-open] .site-nav,
.site-nav[data-open]{transform:translateX(0);}

.site-nav__eyebrow{
  font-family:var(--font-cond);
  font-size:11px;
  letter-spacing:.3em;
  text-transform:uppercase;
  color:var(--lime);
}
.site-nav__list{list-style:none;display:flex;flex-direction:column;}
.site-nav__item{border-top:1px solid var(--line-soft);}
.site-nav__item:last-child{border-bottom:1px solid var(--line-soft);}
.site-nav__link{
  display:flex;
  align-items:baseline;
  gap:12px;
  padding:14px 2px;
  color:var(--paper);
  font-size:16px;
  text-decoration:none;
  transition:color .2s var(--ease),background-color .2s var(--ease),box-shadow .2s var(--ease);
}
.site-nav__num{
  min-width:2ch;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.06em;
  color:var(--hairline);
  transition:color .2s var(--ease);
}
.site-nav__label{letter-spacing:.02em;}
.site-nav__link:hover,
.site-nav__link:focus-visible{color:var(--lime);}
.site-nav__link:hover .site-nav__num,
.site-nav__link:focus-visible .site-nav__num{color:var(--lime);}
.site-nav__link[aria-current="page"]{
  color:var(--lime);
  background:linear-gradient(90deg,rgba(200,255,61,.12),transparent 70%);
  box-shadow:inset 2px 0 0 var(--lime);
}
.site-nav__link[aria-current="page"] .site-nav__num{color:var(--lime);}

.site-nav__cta{width:100%;}
.site-nav__note{
  margin-top:auto;
  font-size:12px;
  line-height:1.7;
  color:var(--hairline);
}

.header-progress{
  position:absolute;
  left:0;right:0;bottom:0;
  z-index:4;
  height:2px;
  background:rgba(94,107,98,.3);
  pointer-events:none;
}
.header-progress__bar{
  display:block;
  width:100%;height:100%;
  background:linear-gradient(90deg,var(--lime),var(--ember));
  transform:scaleX(var(--progress,0));
  transform-origin:0 50%;
  transition:transform .12s linear;
}

/* ---------- 05 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(48px,7vw,96px);
  padding:clamp(36px,5vw,68px) var(--gutter) 0;
  color:var(--stone);
  font-size:15px;
  border-top:1px solid rgba(200,255,61,.4);
  background:
    repeating-linear-gradient(90deg,rgba(94,107,98,.16) 0 1px,transparent 1px 76px),
    linear-gradient(180deg,var(--ink-900),var(--ink-800) 130%);
}
.footer-inner{width:100%;max-width:var(--shell-max);margin-inline:auto;}

.footer-top{
  display:grid;
  gap:18px;
  padding-bottom:clamp(24px,3.6vw,40px);
  border-bottom:1px solid var(--line-soft);
}
.footer-brand{
  display:grid;
  grid-template-columns:auto 1fr;
  column-gap:12px;
  row-gap:2px;
  align-items:center;
}
.footer-brand__mark{
  grid-row:1 / span 2;
  display:grid;
  place-items:center;
  width:44px;height:44px;
  border:1px solid var(--lime);
  background:rgba(200,255,61,.07);
  color:var(--lime);
  font-family:var(--font-display);
  font-size:20px;
  font-weight:700;
  line-height:1;
}
.footer-brand__name{
  font-family:var(--font-cond);
  font-size:18px;
  letter-spacing:.22em;
  color:var(--paper);
}
.footer-brand__kicker{
  font-size:11px;
  letter-spacing:.22em;
  color:var(--hairline);
}
.footer-top__line{
  font-family:var(--font-display);
  font-size:clamp(20px,3.2vw,32px);
  line-height:1.35;
  color:var(--paper);
  max-width:22ch;
}

.footer-body{
  display:grid;
  gap:clamp(28px,4vw,48px);
  padding-block:clamp(26px,4vw,44px);
}
.footer-columns{
  display:grid;
  gap:clamp(20px,3vw,36px);
  grid-template-columns:repeat(auto-fit,minmax(140px,1fr));
}
.footer-col__title{
  margin-bottom:12px;
  font-family:var(--font-cond);
  font-size:12px;
  font-weight:600;
  letter-spacing:.26em;
  text-transform:uppercase;
  color:var(--lime);
}
.footer-list{list-style:none;display:flex;flex-direction:column;gap:10px;}
.footer-list__link{
  font-size:14px;
  color:var(--stone);
  text-decoration:none;
  transition:color .2s var(--ease);
}
.footer-list__link:hover,
.footer-list__link:focus-visible{
  color:var(--paper);
  text-decoration:underline;
  text-decoration-color:var(--lime);
  text-underline-offset:5px;
}

.footer-contact{display:grid;gap:12px;align-content:start;}
.footer-contact__row{display:block;font-size:13px;line-height:1.6;}
.footer-contact__key{
  display:block;
  font-family:var(--font-cond);
  font-size:11px;
  letter-spacing:.24em;
  text-transform:uppercase;
  color:var(--hairline);
}
.footer-contact__value{
  color:var(--paper);
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.01em;
  word-break:break-word;
}
.footer-note{
  font-size:12px;
  line-height:1.7;
  color:var(--hairline);
  max-width:36ch;
  padding-top:6px;
  border-top:1px solid var(--line-soft);
}

.footer-meta{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:8px 24px;
  padding-block:18px;
  border-top:1px solid var(--line-soft);
  font-family:var(--font-cond);
  font-size:12px;
  letter-spacing:.16em;
  color:var(--hairline);
}
.footer-meta__copy,.footer-meta__icp{margin:0;}

/* ---------- 06 动效与响应式 ---------- */
.js [data-reveal]{
  opacity:0;
  transform:translateY(14px);
  transition:opacity .62s var(--ease),transform .62s var(--ease);
  will-change:opacity,transform;
}
.js [data-reveal].is-revealed{opacity:1;transform:none;}

@media (min-width:600px){
  .footer-top{grid-template-columns:auto minmax(0,1fr);align-items:end;gap:32px;}
  .footer-top__line{justify-self:end;text-align:right;}
}

@media (min-width:760px){
  .footer-body{grid-template-columns:minmax(0,2fr) minmax(0,1fr);}
  .footer-contact{
    padding-left:clamp(16px,2.4vw,28px);
    border-left:1px solid var(--line-soft);
  }
}

/* 桌面：页头转为左侧看台轨道 */
@media (min-width:1000px){
  :root{--bar-h:0px;}

  html{scroll-padding-top:24px;}

  body{padding-top:0;padding-left:var(--rail-w);}

  .skip-link{left:calc(var(--rail-w) + 10px);}

  .site-header{
    inset:0 auto 0 0;
    width:var(--rail-w);
    height:100dvh;
    flex-direction:column;
    align-items:center;
    justify-content:flex-start;
    gap:0;
    padding:18px 0 16px;
    border-bottom:0;
    border-right:1px solid var(--line-soft);
    background:linear-gradient(180deg,var(--ink-800) 0%,var(--ink-900) 62%,var(--ink-900) 100%);
    box-shadow:12px 0 40px -34px #000;
  }
  .site-header::before{display:none;}

  .nav-toggle{display:none;}

  .brand{flex-direction:column;gap:8px;text-align:center;}
  .brand__text{align-items:center;}
  .brand__mark{width:40px;height:40px;font-size:19px;}
  .brand__name{font-size:12px;letter-spacing:.28em;}
  .brand__line{display:none;}

  .site-nav{
    position:static;
    transform:none;
    width:100%;
    height:auto;
    max-height:calc(100dvh - 190px);
    margin-block:auto;
    padding:0;
    overflow-y:auto;
    scrollbar-width:none;
    border:0;
    background:none;
    align-items:center;
    justify-content:center;
    gap:4px;
  }
  .site-nav::-webkit-scrollbar{display:none;}
  .site-nav__eyebrow,
  .site-nav__note{display:none;}

  .site-nav__list{flex-direction:column;align-items:center;gap:2px;}
  .site-nav__item{border:0;}
  .site-nav__item:last-child{border-bottom:0;}

  .site-nav__link{
    writing-mode:vertical-rl;
    text-orientation:upright;
    flex-direction:row;
    align-items:center;
    gap:4px;
    padding:12px 6px;
    font-size:12px;
    letter-spacing:.16em;
    border:1px solid transparent;
    box-shadow:none;
    background:none;
  }
  .site-nav__num{display:none;}
  .site-nav__link:hover,
  .site-nav__link:focus-visible{
    color:var(--lime);
    border-color:rgba(200,255,61,.42);
  }
  .site-nav__link[aria-current="page"]{
    color:var(--lime);
    background:rgba(200,255,61,.08);
    border-color:var(--lime);
    box-shadow:none;
  }

  .site-nav__cta{
    writing-mode:vertical-rl;
    text-orientation:upright;
    width:auto;
    min-height:0;
    margin-top:14px;
    padding:16px 9px;
    font-size:12px;
    letter-spacing:.22em;
  }

  .header-progress{
    top:0;bottom:0;left:auto;right:0;
    width:2px;height:auto;
  }
  .header-progress__bar{
    transform:scaleY(var(--progress,0));
    transform-origin:50% 0;
  }
}

@media (min-width:1000px) and (max-height:780px){
  .site-nav__link{padding:9px 6px;font-size:11px;letter-spacing:.12em;}
  .site-nav__cta{padding:12px 8px;font-size:11px;}
  .brand__mark{width:34px;height:34px;font-size:16px;}
}

@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;}
}