/* ============================================================
   中欧体育看台 · /assets/site.css
   共享外壳：令牌、重置、排版、头部、页脚、通用组件
   ============================================================ */

/* ---------- 1. 设计令牌 ---------- */
:root{
  --turf:#0B3D2E;
  --night:#071C15;
  --flood:#F28C28;
  --crest:#C62828;
  --silver:#C9D1D3;
  --paper:#F8F5EC;
  --ink:#14201B;
  --grass:#3E7C59;
  --flood-soft:#FFD8A8;
  --edge:#5C6B64;

  --ink-72:rgba(20,32,27,.72);
  --paper-80:rgba(248,245,236,.8);
  --silver-40:rgba(201,209,211,.4);
  --silver-22:rgba(201,209,211,.22);
  --silver-14:rgba(201,209,211,.14);

  --font-head:"PingFang SC","Noto Sans SC","Source Han Sans SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --font-body:"PingFang SC","Noto Sans SC","Source Han Sans SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --font-num:ui-monospace,"SFMono-Regular","Menlo","Consolas","Liberation Mono",monospace;

  --header-h:78px;
  --container:1200px;
  --gutter:clamp(18px,4vw,48px);
  --radius-s:8px;
  --radius:16px;
  --radius-l:28px;
  --shadow-card:0 24px 48px -34px rgba(7,28,21,.75);
  --shadow-header:0 14px 34px -18px rgba(7,28,21,.7);
  --ease:cubic-bezier(.22,.7,.3,1);
}

/* ---------- 2. 重置 ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,h5,p,figure,blockquote,dl,dd,ul,ol{margin:0}
ul,ol{padding:0}
ul[class],ol[class]{list-style:none}
img,svg{display:block;max-width:100%}
img{height:auto}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
table{border-collapse:collapse}
:focus-visible{outline:3px solid var(--flood);outline-offset:3px;border-radius:4px}

/* ---------- 3. 基础排版 ---------- */
body{
  background:var(--paper);
  color:var(--ink);
  font-family:var(--font-body);
  font-size:clamp(16px,.55vw + 14.6px,17.5px);
  line-height:1.78;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{font-family:var(--font-head);font-weight:900;line-height:1.08;letter-spacing:-.01em}
p{text-wrap:pretty}
#main-content{display:block;scroll-margin-top:calc(var(--header-h) + 18px)}

.visually-hidden{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}

/* ---------- 4. 通用布局 ---------- */
.container{width:min(100% - var(--gutter) * 2,var(--container));margin-inline:auto}
.section{padding-block:clamp(56px,8vw,116px)}
.section--paper{background:var(--paper);color:var(--ink)}
.section--turf{background:var(--turf);color:var(--paper)}
.section--night{background:var(--night);color:var(--paper)}
.hero-pad{padding-top:calc(var(--header-h) + clamp(40px,7vw,96px))}

.eyebrow{display:inline-flex;align-items:center;gap:.7em;font-size:.74rem;font-weight:800;letter-spacing:.2em;text-transform:uppercase;color:var(--flood)}
.eyebrow::before{content:"";width:28px;height:2px;background:currentColor;flex:0 0 auto}

.display-title{font-family:var(--font-head);font-weight:900;font-size:clamp(3rem,8vw,7rem);line-height:.92;letter-spacing:-.02em;text-wrap:balance}
.section-title{font-family:var(--font-head);font-weight:900;font-size:clamp(1.8rem,3.5vw,3.2rem);line-height:1.04;letter-spacing:-.015em;text-wrap:balance}
.lede{font-size:clamp(1rem,1.2vw,1.16rem);line-height:1.78;max-width:54ch;opacity:.86}

.num{font-family:var(--font-num);font-variant-numeric:tabular-nums;letter-spacing:.02em}
.stat{display:flex;flex-direction:column;gap:6px}
.stat__value{font-family:var(--font-num);font-variant-numeric:tabular-nums;font-weight:700;line-height:1;font-size:clamp(2rem,4vw,3.4rem);color:var(--flood)}
.stat__label{font-size:.75rem;letter-spacing:.14em;text-transform:uppercase;opacity:.7}

.tag{display:inline-flex;align-items:center;gap:.4em;padding:.34em .78em;border-radius:999px;background:rgba(242,140,40,.14);border:1px solid rgba(242,140,40,.38);color:#B85F0C;font-size:.74rem;font-weight:800;letter-spacing:.08em}
.tag--alt{background:rgba(198,40,40,.1);border-color:rgba(198,40,40,.32);color:var(--crest)}
.section--turf .tag,.section--night .tag{color:var(--flood-soft);background:rgba(242,140,40,.16)}

.grid{display:grid;gap:clamp(16px,2.4vw,32px)}
.grid--2{grid-template-columns:repeat(auto-fit,minmax(258px,1fr))}
.grid--3{grid-template-columns:repeat(auto-fit,minmax(214px,1fr))}
.grid--split{grid-template-columns:1fr;gap:clamp(24px,4vw,56px)}
@media (min-width:900px){
  .grid--split{grid-template-columns:minmax(0,1fr) minmax(0,1.18fr);align-items:start}
}

.card{background:var(--paper);color:var(--ink);border:1px solid var(--silver-40);border-radius:var(--radius);padding:clamp(20px,2.4vw,32px);box-shadow:var(--shadow-card)}
.section--turf .card,.section--night .card{background:rgba(248,245,236,.05);border-color:var(--silver-22);color:var(--paper);box-shadow:none;backdrop-filter:blur(2px)}

/* 看台阶梯卡片 */
.stair{display:grid;gap:clamp(16px,2.4vw,28px);align-items:start}
@media (min-width:860px){
  .stair--steps{grid-template-columns:repeat(3,minmax(0,1fr))}
  .stair--steps > *:nth-child(3n+2){margin-top:34px}
  .stair--steps > *:nth-child(3n+3){margin-top:68px}
}

/* 图片容器基础规则（页面阶段放 <img> 即可） */
.media{position:relative;display:block;overflow:hidden;border-radius:var(--radius);aspect-ratio:16 / 9;background:linear-gradient(150deg,var(--turf),var(--night));color:var(--paper);isolation:isolate}
.media > img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;z-index:0}
.media::before{content:"";position:absolute;inset:0;z-index:1;pointer-events:none;opacity:.85;background:
  repeating-linear-gradient(90deg,rgba(201,209,211,.1) 0 1px,transparent 1px 74px),
  repeating-linear-gradient(0deg,rgba(201,209,211,.08) 0 1px,transparent 1px 74px)}
.media__caption{position:absolute;inset:auto 0 0 0;z-index:2;padding:clamp(14px,2vw,22px);font-size:.78rem;letter-spacing:.1em;background:linear-gradient(0deg,rgba(7,28,21,.88),rgba(7,28,21,0))}
.media--wide{aspect-ratio:21 / 9}
.media--square{aspect-ratio:1 / 1}
.media--tall{aspect-ratio:4 / 5}

/* 面包屑 */
.breadcrumbs{display:flex;flex-wrap:wrap;align-items:center;gap:.5em;font-size:.78rem;letter-spacing:.08em;color:var(--paper-80)}
.breadcrumbs__link{text-decoration:underline;text-decoration-color:var(--silver-40);text-underline-offset:4px}
.breadcrumbs__link:hover{color:var(--flood)}
.breadcrumbs__sep{opacity:.45}
.breadcrumbs__current{color:var(--paper);font-weight:800}
.breadcrumbs--dark{color:var(--edge)}
.breadcrumbs--dark .breadcrumbs__current{color:var(--ink)}
.breadcrumbs--dark .breadcrumbs__link:hover{color:var(--grass)}

/* 正文长文 */
.prose{max-width:70ch;font-size:1.02rem;line-height:1.82}
.prose > * + *{margin-top:1.1em}
.prose h2{font-size:clamp(1.5rem,2.4vw,2.05rem);line-height:1.22;margin-top:2em}
.prose h3{font-size:clamp(1.15rem,1.6vw,1.4rem);margin-top:1.7em}
.prose ul{list-style:none}
.prose ul li{position:relative;padding-left:1.4em}
.prose ul li + li{margin-top:.5em}
.prose ul li::before{content:"";position:absolute;left:0;top:.78em;width:9px;height:2px;background:var(--flood)}
.prose a{color:var(--grass);text-decoration:underline;text-underline-offset:3px}
.prose blockquote{border-left:3px solid var(--flood);padding-left:1.1em;color:var(--ink-72)}
.section--turf .prose,.section--night .prose{color:var(--paper-80)}

/* 数据表 */
.table{width:100%;font-size:.92rem}
.table th,.table td{padding:.72em .9em;border-bottom:1px solid var(--silver-40);text-align:left;vertical-align:top}
.table thead th{font-size:.72rem;letter-spacing:.14em;text-transform:uppercase;color:var(--edge)}
.table td.num{text-align:right;font-variant-numeric:tabular-nums}
.section--turf .table th,.section--turf .table td{border-color:var(--silver-22)}
.section--night .table th,.section--night .table td{border-color:var(--silver-22)}

/* 球场虚线分隔 */
.rule{height:0;border:0;border-top:1px dashed var(--silver-40);margin-block:clamp(28px,4vw,56px);opacity:.7}

/* ---------- 5. 按钮 ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5em;padding:.74em 1.3em;border-radius:999px;border:1px solid transparent;font-family:var(--font-body);font-weight:800;font-size:.85rem;letter-spacing:.04em;line-height:1.2;text-align:center;transition:transform .25s var(--ease),background-color .25s ease,border-color .25s ease,color .25s ease}
.btn:hover{transform:translateY(-2px)}
.btn:active{transform:translateY(0)}
.btn--primary{background:var(--flood);color:#241305;box-shadow:0 14px 26px -16px rgba(242,140,40,.9)}
.btn--primary:hover{background:#FFA24B}
.btn--ghost{color:var(--paper);border-color:var(--silver-40);background:rgba(248,245,236,.06)}
.btn--ghost:hover{background:rgba(248,245,236,.16);border-color:var(--paper)}
.btn--solid{background:var(--turf);color:var(--paper)}
.btn--solid:hover{background:var(--grass)}
.btn--block{width:100%}

/* ---------- 6. 头部 ---------- */
.skip-link{position:fixed;top:10px;left:10px;z-index:120;padding:.7em 1.1em;border-radius:999px;background:var(--flood);color:#241305;font-weight:800;font-size:.85rem;transform:translateY(-160%);transition:transform .25s var(--ease)}
.skip-link:focus{transform:translateY(0)}

.site-header{
  position:fixed;
  inset:0 0 auto 0;
  z-index:70;
  color:var(--paper);
  background:transparent;
  transition:background-color .35s ease,box-shadow .35s ease;
}
.site-header::before{
  content:"";
  position:absolute;
  inset:0;
  z-index:-1;
  pointer-events:none;
  background:linear-gradient(180deg,rgba(7,28,21,.86),rgba(7,28,21,.34) 62%,rgba(7,28,21,0));
  transition:opacity .35s ease;
  opacity:1;
}
.site-header[data-scrolled="true"],
.site-header[data-nav-open="true"]{
  background:var(--turf);
  box-shadow:var(--shadow-header);
}
.site-header[data-scrolled="true"]::before,
.site-header[data-nav-open="true"]::before{opacity:0}

.site-header__rail{position:absolute;left:0;right:0;bottom:0;height:2px;background:var(--silver-14);overflow:hidden}
.site-header__rail-progress{display:block;height:100%;width:100%;transform:scaleX(0);transform-origin:0 50%;background:linear-gradient(90deg,var(--flood),var(--crest));transition:transform .12s linear}

.site-header__inner{display:flex;align-items:center;gap:clamp(12px,1.6vw,26px);min-height:var(--header-h);position:relative}

.brand{display:inline-flex;align-items:center;gap:12px;flex:0 0 auto;padding:6px 0;color:inherit}
.brand__crest{width:32px;height:38px;flex:0 0 auto;color:var(--flood)}
.brand__crest svg{width:100%;height:100%}
.brand__text{display:flex;flex-direction:column;line-height:1.15}
.brand__name{font-family:var(--font-head);font-weight:900;font-size:1.06rem;letter-spacing:.1em}
.brand__descriptor{margin-top:4px;font-size:.64rem;letter-spacing:.16em;color:rgba(201,209,211,.82);white-space:nowrap}
.brand:hover .brand__crest{color:var(--flood-soft)}

.site-nav{display:flex;align-items:center;gap:clamp(8px,1.2vw,18px);margin-left:auto}
.site-nav__list{display:flex;align-items:center;gap:2px;list-style:none;margin:0;padding:0}
.site-nav__item{display:block}
.site-nav__link{display:inline-block;position:relative;padding:10px 9px;font-size:.83rem;font-weight:800;letter-spacing:.03em;color:rgba(248,245,236,.82);white-space:nowrap;transition:color .2s ease}
.site-nav__link::after{content:"";position:absolute;left:9px;right:9px;bottom:4px;height:2px;background:var(--flood);transform:scaleX(0);transform-origin:0 50%;transition:transform .28s var(--ease)}
.site-nav__link:hover{color:var(--paper)}
.site-nav__link:hover::after{transform:scaleX(1)}
.site-nav__link[aria-current="page"]{color:var(--flood)}
.site-nav__link[aria-current="page"]::after{transform:scaleX(1)}
.site-nav__actions{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.site-nav__actions .btn{font-size:.8rem;padding:.62em 1.05em}

.nav-toggle{display:none;align-items:center;gap:10px;margin-left:auto;padding:9px 14px;border-radius:999px;border:1px solid var(--silver-40);background:rgba(7,28,21,.38);color:var(--paper);font-size:.76rem;font-weight:800;letter-spacing:.16em}
.nav-toggle__label{line-height:1}
.nav-toggle__bars{display:grid;gap:4px;width:18px}
.nav-toggle__bars span{display:block;height:2px;border-radius:2px;background:currentColor;transition:transform .3s var(--ease),opacity .2s ease}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(1){transform:translateY(6px) 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(-6px) rotate(-45deg)}

/* 移动端阶梯抽屉 */
@media (max-width:1120px){
  :root{--header-h:66px}
  .nav-toggle{display:inline-flex}
  .site-nav{
    position:fixed;
    left:0;right:0;top:var(--header-h);
    display:block;
    margin-left:0;
    max-height:calc(100dvh - var(--header-h));
    overflow-y:auto;
    padding:16px var(--gutter) 30px;
    background:linear-gradient(180deg,#0B3D2E 0%,#071C15 100%);
    border-top:1px solid var(--silver-22);
    box-shadow:0 40px 70px -30px rgba(0,0,0,.85);
    opacity:0;
    visibility:hidden;
    transform:translateY(-12px);
    transition:opacity .3s var(--ease),transform .3s var(--ease),visibility .3s linear;
  }
  .site-nav[data-open="true"]{opacity:1;visibility:visible;transform:none}
  .site-nav__list{flex-direction:column;align-items:stretch}
  .site-nav__item{border-bottom:1px solid var(--silver-14)}
  .site-nav__item:nth-child(1){--stair:0px}
  .site-nav__item:nth-child(2){--stair:12px}
  .site-nav__item:nth-child(3){--stair:24px}
  .site-nav__item:nth-child(4){--stair:36px}
  .site-nav__item:nth-child(5){--stair:48px}
  .site-nav__item:nth-child(6){--stair:60px}
  .site-nav__link{display:block;padding:15px 6px 15px calc(8px + var(--stair,0px));font-size:1rem;letter-spacing:.04em}
  .site-nav__link::after{left:calc(8px + var(--stair,0px));right:auto;width:26px;bottom:8px}
  .site-nav__actions{flex-direction:column;align-items:stretch;gap:10px;margin-top:22px}
  .site-nav__actions .btn{width:100%;font-size:.88rem;padding:.85em 1.2em}
  html.is-nav-open,html.is-nav-open body{overflow:hidden}
  .brand__descriptor{display:none}
}

/* ---------- 7. 页脚 ---------- */
.site-footer{position:relative;background:var(--night);color:var(--paper);overflow:hidden}
.site-footer__steps{
  height:12px;
  background:
    repeating-linear-gradient(90deg,rgba(242,140,40,.9) 0 3px,transparent 3px 20px),
    linear-gradient(90deg,var(--turf),var(--grass) 55%,var(--night));
  opacity:.9;
}
.site-footer__inner{
  display:grid;
  gap:clamp(30px,4vw,60px);
  padding-block:clamp(44px,6vw,84px);
  grid-template-columns:1fr;
}
@media (min-width:760px){
  .site-footer__inner{grid-template-columns:minmax(0,1fr) minmax(0,1.35fr)}
}
@media (min-width:1080px){
  .site-footer__inner{grid-template-columns:minmax(0,1.05fr) minmax(0,1.5fr) minmax(0,.95fr)}
}

.footer-brand{max-width:34ch}
.brand--footer{margin-bottom:18px}
.brand--footer .brand__name{font-size:1.12rem}
.footer-brand__blurb{font-size:.92rem;line-height:1.8;color:rgba(248,245,236,.76)}
.footer-brand__meta{margin-top:16px;font-size:.74rem;letter-spacing:.12em;color:var(--flood)}

.footer-nav{display:grid;grid-template-columns:repeat(auto-fit,minmax(128px,1fr));gap:clamp(20px,3vw,36px)}
.footer-col__title{margin:0 0 14px;font-size:.72rem;font-weight:800;letter-spacing:.2em;text-transform:uppercase;color:var(--flood)}
.footer-col__list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:10px}
.footer-col__link{position:relative;font-size:.9rem;color:rgba(248,245,236,.76);transition:color .2s ease}
.footer-col__link::after{content:"";position:absolute;left:0;bottom:-2px;width:100%;height:1px;background:var(--flood);transform:scaleX(0);transform-origin:0 50%;transition:transform .26s var(--ease)}
.footer-col__link:hover{color:var(--paper)}
.footer-col__link:hover::after{transform:scaleX(1)}

.footer-contact{padding:clamp(18px,2.4vw,26px);border:1px dashed var(--silver-22);border-radius:var(--radius);background:rgba(248,245,236,.04)}
.contact-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:14px}
.contact-list__item{display:flex;flex-direction:column;gap:3px}
.contact-list__label{font-size:.68rem;letter-spacing:.18em;text-transform:uppercase;color:var(--silver-40)}
.contact-list__value{font-size:.9rem;line-height:1.65;color:rgba(248,245,236,.88);word-break:break-word}
.contact-note{margin-top:16px;padding-top:14px;border-top:1px solid var(--silver-14);font-size:.76rem;line-height:1.7;color:rgba(201,209,211,.7)}

.footer-legal{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:12px 26px;
  padding-block:22px 30px;
  border-top:1px solid var(--silver-14);
  font-size:.76rem;
  letter-spacing:.06em;
  color:rgba(201,209,211,.66);
}
.footer-legal__copy{margin:0}
.footer-legal__links{list-style:none;display:flex;flex-wrap:wrap;gap:18px;margin:0;padding:0}
.footer-legal__link{color:inherit;transition:color .2s ease}
.footer-legal__link:hover{color:var(--flood)}
.footer-legal__icp{margin:0}
@media (min-width:900px){
  .footer-legal__icp{margin-left:auto}
}

/* ---------- 8. 动效 ---------- */
[data-reveal]{
  opacity:0;
  transform:translateY(20px);
  transition:opacity .6s ease,transform .6s var(--ease);
  transition-delay:var(--reveal-delay,0ms);
}
[data-reveal].is-visible{opacity:1;transform:none}

@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 !important;transform:none !important;transition:none !important}
  .btn:hover{transform:none}
}