/* =========================================================
   乐赢赛事 · 全站共享样式 /assets/site.css
   外壳：左侧轨道导航 + 顶部索引条 + 午夜蓝页脚
   ========================================================= */

:root{
  --orange:#F2681F;
  --orange-soft:#FF8A3D;
  --navy:#12365F;
  --midnight:#0A2440;
  --sky:#DCE9F7;
  --paper:#FBF7F1;
  --mist:#EDF1F5;
  --sand:#FFE0C7;
  --ink:#46566A;
  --green:#2E9E6B;
  --alert:#D6453C;
  --line:rgba(18,54,95,.14);
  --line-soft:rgba(18,54,95,.08);
  --on-dark:#F1F5F9;
  --rail-w:232px;
  --bar-h:56px;
  --r-lg:32px;
  --r-md:24px;
  --r-sm:18px;
  --shell:1240px;
  --font:'Source Han Sans SC','PingFang SC','Microsoft YaHei','Noto Sans SC',system-ui,sans-serif;
}

/* ---------- reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:84px}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--font);
  font-size:16.5px;
  line-height:1.85;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
h1,h2,h3,h4,h5,p,ul,ol,dl,dd,dt,figure,blockquote{margin:0}
ul,ol{padding:0;list-style:none}
img,svg,video{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer}
table{border-collapse:collapse;width:100%}
:focus-visible{outline:2px solid var(--orange);outline-offset:3px;border-radius:4px}
::selection{background:var(--orange);color:#fff}

/* ---------- 跳至主要内容 ---------- */
.skip-link{
  position:fixed;top:10px;left:10px;z-index:300;
  transform:translateY(-220%);
  display:inline-flex;align-items:center;min-height:44px;
  padding:0 20px;border-radius:999px;
  background:var(--midnight);color:#fff;
  font-size:13px;letter-spacing:.14em;font-weight:600;
  transition:transform .22s ease;
}
.skip-link:focus{transform:translateY(0)}

/* =========================================================
   头部外壳
   ========================================================= */
.site-header{position:sticky;top:0;z-index:80}

/* 顶部索引条（移动端为品牌栏） */
.site-header__bar{
  position:relative;z-index:88;
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  height:64px;padding:0 16px;
  background:var(--paper);
  border-bottom:1px solid var(--line);
}
.bar__brand{
  display:inline-flex;align-items:center;min-height:44px;
  font-size:17px;font-weight:700;letter-spacing:.02em;color:var(--navy);
}
.bar__status{display:none}
.bar__actions{display:flex;align-items:center;gap:10px}
.bar__cta{
  display:none;align-items:center;min-height:38px;padding:0 16px;
  border-radius:999px;background:var(--orange);color:var(--midnight);
  font-size:12.5px;font-weight:700;letter-spacing:.08em;
  transition:background .2s ease;
}
.bar__cta:hover{background:var(--orange-soft)}

/* 抽屉开关 */
.nav-toggle{
  display:inline-flex;align-items:center;gap:9px;
  min-height:44px;min-width:44px;justify-content:flex-end;
  font-size:12px;letter-spacing:.16em;font-weight:600;color:var(--navy);
}
.nav-toggle__bars{position:relative;display:block;width:22px;height:12px}
.nav-toggle__bars i{
  position:absolute;left:0;right:0;height:2px;border-radius:2px;background:var(--navy);
  transition:transform .25s ease,top .25s ease;
}
.nav-toggle__bars i:first-child{top:0}
.nav-toggle__bars i:last-child{top:10px}
.site-header[data-open] .nav-toggle__bars i:first-child{top:5px;transform:rotate(45deg)}
.site-header[data-open] .nav-toggle__bars i:last-child{top:5px;transform:rotate(-45deg)}

/* 轨道导航 / 移动抽屉 */
.site-header__rail{
  position:fixed;top:64px;left:0;bottom:0;
  width:min(86vw,320px);
  transform:translateX(-104%);
  transition:transform .32s cubic-bezier(.22,.68,.28,1);
  z-index:86;
  display:flex;flex-direction:column;justify-content:space-between;
  gap:22px;
  padding:22px 18px 20px;
  background:var(--navy);color:var(--on-dark);
  overflow-y:auto;
  box-shadow:0 0 0 1px rgba(10,36,64,.06);
}
.site-header[data-open] .site-header__rail{transform:translateX(0)}
.site-header[data-open]::after{
  content:"";position:fixed;inset:64px 0 0 0;
  background:rgba(10,36,64,.52);z-index:84;
}

/* 品牌区 */
.rail__brand{display:block;padding-bottom:20px;border-bottom:1px solid rgba(241,245,249,.16)}
.rail__glyph{
  display:inline-flex;align-items:center;justify-content:center;
  width:52px;height:52px;border-radius:18px;
  background:var(--orange);color:var(--midnight);
  font-size:16px;font-weight:700;letter-spacing:.04em;line-height:1.1;
}
.rail__name{display:block;margin-top:12px;font-size:19px;font-weight:700;letter-spacing:.02em;color:#fff}
.rail__tag{display:block;margin-top:6px;font-size:12px;letter-spacing:.1em;color:rgba(241,245,249,.64)}

/* 导航列表 */
.nav-track{flex:1 1 auto}
.nav-track__list{display:flex;flex-direction:column;gap:2px;margin-top:20px}
.nav-track__list a{
  position:relative;
  display:flex;align-items:center;gap:12px;
  min-height:44px;padding:0 14px;border-radius:14px;
  font-size:15px;font-weight:500;color:rgba(241,245,249,.78);
  transition:background .2s ease,color .2s ease;
}
.nav-track__list a:hover{background:rgba(241,245,249,.09);color:#fff}
.nav-track__num{
  font-size:11px;letter-spacing:.14em;font-weight:500;
  font-variant-numeric:tabular-nums;
  color:rgba(241,245,249,.42);
}
.nav-track__label{line-height:1.4}
.nav-track__list a[aria-current="page"]{background:rgba(242,104,31,.16);color:#fff}
.nav-track__list a[aria-current="page"] .nav-track__num{color:var(--orange-soft)}
.nav-track__list a[aria-current="page"]::before{
  content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);
  width:3px;height:22px;border-radius:3px;background:var(--orange);
}

/* 轨道底部 */
.rail__foot{
  display:flex;flex-direction:column;gap:10px;
  padding-top:18px;border-top:1px solid rgba(241,245,249,.16);
}
.rail__hours{font-size:12px;letter-spacing:.08em;color:rgba(241,245,249,.74)}
.rail__promise{font-size:12px;line-height:1.7;color:rgba(241,245,249,.55)}

/* =========================================================
   通用按钮
   ========================================================= */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:12px 22px;border-radius:999px;
  font-size:14px;font-weight:700;letter-spacing:.06em;
  border:1px solid transparent;
  transition:background .2s ease,color .2s ease,border-color .2s ease,transform .2s ease;
}
.btn--warm{background:var(--orange);color:var(--midnight)}
.btn--warm:hover{background:var(--orange-soft)}
.btn--navy{background:var(--navy);color:#fff}
.btn--navy:hover{background:var(--midnight)}
.btn--ghost{background:transparent;border-color:rgba(242,104,31,.5);color:var(--orange)}
.btn--ghost:hover{background:rgba(242,104,31,.1)}
.btn--block{width:100%}

/* =========================================================
   版式工具
   ========================================================= */
.t-display{
  font-size:clamp(44px,7.5vw,112px);
  line-height:1.02;letter-spacing:-.03em;font-weight:700;
  color:var(--navy);
}
.t-section{
  font-size:clamp(32px,4.4vw,52px);
  line-height:1.15;letter-spacing:-.02em;font-weight:700;
  color:var(--navy);
}
.t-lede{font-size:clamp(17px,1.6vw,20px);line-height:1.75;color:var(--navy);font-weight:400}
.t-body{font-size:16.5px;line-height:1.85;color:var(--ink)}
.index-label{
  font-size:12px;letter-spacing:.16em;font-weight:500;
  color:var(--orange);font-variant-numeric:tabular-nums;
}
.u-warm{
  background-image:linear-gradient(var(--orange),var(--orange));
  background-size:100% 6px;background-position:0 92%;background-repeat:no-repeat;
}

/* =========================================================
   容器与章节
   ========================================================= */
.shell{
  width:100%;max-width:var(--shell);margin-inline:auto;
  padding-inline:clamp(18px,4vw,40px);
}
.shell--narrow{max-width:800px}
.section{padding-block:clamp(56px,8vw,108px)}
.section--wide{background:var(--mist)}
.section--paper{background:var(--paper)}
.section--navy{background:var(--navy);color:var(--on-dark)}
.section--navy .t-section,.section--navy .t-num,.section--navy .metric__value{color:#fff}
.section--navy .t-body,.section--navy .metric__label,.section--navy .metric__unit{color:rgba(241,245,249,.78)}
.section--navy .index-label{color:var(--orange-soft)}

/* 章节索引对 */
.section-head{display:flex;flex-direction:column;gap:12px;max-width:760px}
.section-head .index-label{display:block}

/* =========================================================
   Bento 网格
   ========================================================= */
.bento{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));column-gap:20px;row-gap:32px}
.span-3{grid-column:span 3}
.span-4{grid-column:span 4}
.span-5{grid-column:span 5}
.span-6{grid-column:span 6}
.span-7{grid-column:span 7}
.span-8{grid-column:span 8}
.span-9{grid-column:span 9}
.span-12{grid-column:span 12}

/* =========================================================
   卡片
   ========================================================= */
.card{
  position:relative;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-md);
  padding:clamp(20px,2.4vw,30px);
  transition:transform .28s cubic-bezier(.22,.68,.28,1),border-color .28s ease,background .28s ease;
}
.card:hover{transform:translateY(-4px);border-color:rgba(242,104,31,.55)}
.card--focus{
  border-radius:var(--r-lg);
  padding:clamp(26px,3.2vw,42px);
}
.card--sky{background:var(--sky);border-color:transparent}
.card--sand{background:var(--sand);border-color:transparent}
.card--mist{background:var(--mist);border-color:transparent}
.card--navy{background:var(--navy);border-color:transparent;color:var(--on-dark)}
.card--navy .t-section,.card--navy .t-num,.card--navy .metric__value{color:#fff}
.card--navy .t-body,.card--navy .metric__label{color:rgba(241,245,249,.78)}
.card--navy .index-label{color:var(--orange-soft)}
.card--navy:hover{border-color:rgba(255,138,61,.7)}

/* 承诺标记 */
.pledge{
  display:inline-flex;align-items:center;gap:10px;
  font-size:13px;letter-spacing:.06em;font-weight:600;color:var(--navy);
}
.pledge__mark{
  flex:none;width:10px;height:10px;border-radius:50%;
  background:var(--green);box-shadow:0 0 0 4px rgba(46,158,107,.16);
}
.pledge--alert .pledge__mark{background:var(--alert);box-shadow:0 0 0 4px rgba(214,69,60,.16)}

/* 数据 */
.metrics{display:grid;grid-template-columns:repeat(auto-fit,minmax(148px,1fr));gap:22px}
.metric{display:flex;flex-direction:column;gap:6px}
.metric__value{
  font-size:clamp(32px,4vw,54px);font-weight:700;line-height:1;
  color:var(--navy);font-variant-numeric:tabular-nums;
}
.metric--warm .metric__value{color:var(--orange)}
.metric--green .metric__value{color:var(--green)}
.metric__unit{font-size:12px;letter-spacing:.14em;color:var(--ink)}
.metric__label{font-size:13.5px;line-height:1.7;color:var(--ink)}
.t-num{font-size:clamp(38px,5vw,64px);font-weight:700;line-height:1;color:var(--navy);font-variant-numeric:tabular-nums}

/* =========================================================
   面包屑
   ========================================================= */
.crumbs{font-size:12px;letter-spacing:.12em;color:rgba(70,86,106,.82)}
.crumbs ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.crumbs li{display:flex;align-items:center;gap:8px;min-height:32px}
.crumbs li+li::before{content:"／";color:rgba(70,86,106,.32)}
.crumbs a:hover{color:var(--orange)}
.crumbs [aria-current="page"]{color:var(--navy);font-weight:600}

/* =========================================================
   正文容器
   ========================================================= */
.prose{max-width:720px}
.prose>*+*{margin-top:1.05em}
.prose h3{
  margin-top:1.9em;
  font-size:clamp(20px,2.2vw,24px);line-height:1.35;font-weight:700;color:var(--navy);
}
.prose ul{display:flex;flex-direction:column;gap:10px}
.prose ul li{position:relative;padding-left:20px}
.prose ul li::before{
  content:"";position:absolute;left:0;top:.78em;
  width:8px;height:2px;border-radius:2px;background:var(--orange);
}
.prose strong{color:var(--navy);font-weight:700}

/* =========================================================
   筛选按钮
   ========================================================= */
.chips{display:flex;flex-wrap:wrap;gap:10px}
.chip{
  display:inline-flex;align-items:center;gap:8px;
  min-height:44px;padding:0 18px;border-radius:999px;
  border:1px solid var(--line);background:#fff;
  font-size:13px;font-weight:600;letter-spacing:.06em;color:var(--navy);
  transition:background .2s ease,color .2s ease,border-color .2s ease;
}
.chip:hover{border-color:rgba(242,104,31,.6);color:var(--orange)}
.chip[aria-pressed="true"]{background:var(--navy);border-color:var(--navy);color:#fff}
.chip__count{font-size:11px;font-variant-numeric:tabular-nums;color:rgba(70,86,106,.68)}
.chip[aria-pressed="true"] .chip__count{color:var(--orange-soft)}
[data-filter-item]{transition:opacity .32s ease,transform .32s ease}
[data-filter-item][data-dim="true"]{opacity:.3;transform:scale(.9)}

/* =========================================================
   问答折叠
   ========================================================= */
.qa{border-bottom:1px solid var(--line)}
.qa>summary{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  min-height:44px;padding:16px 0;cursor:pointer;
  font-size:16.5px;font-weight:600;line-height:1.6;color:var(--navy);
  list-style:none;
}
.qa>summary::-webkit-details-marker{display:none}
.qa>summary::after{
  content:"＋";flex:none;font-size:16px;line-height:1;color:var(--orange);
  transition:transform .25s ease;
}
.qa[open]>summary::after{transform:rotate(45deg)}
.qa__body{padding-bottom:18px;max-width:720px}

/* =========================================================
   图片容器基础规则
   ========================================================= */
.media{
  position:relative;display:block;overflow:hidden;
  border-radius:var(--r-md);background:var(--sky);
}
.media>img,.media>picture>img{width:100%;height:100%;object-fit:cover;object-position:center}
.media--sq{aspect-ratio:1/1}
.media--43{aspect-ratio:4/3}
.media--32{aspect-ratio:3/2}
.media--169{aspect-ratio:16/9}
.media--tall{aspect-ratio:3/4}
.media--bleed{border-radius:var(--r-lg)}
.media--offset{margin-right:-16px}
.media__cap{margin-top:10px;font-size:12px;letter-spacing:.08em;color:var(--ink)}

/* =========================================================
   动效钩子
   ========================================================= */
[data-reveal].is-visible{
  animation:revealRise .42s cubic-bezier(.22,.68,.28,1) backwards;
  animation-delay:calc(var(--reveal-i,0) * 60ms);
}
@keyframes revealRise{
  from{opacity:0;transform:translateY(12px)}
  to{opacity:1;transform:translateY(0)}
}

/* =========================================================
   页脚
   ========================================================= */
.site-footer{background:var(--midnight);color:#E8EEF6}
.footer__top{
  max-width:var(--shell);margin-inline:auto;
  padding:clamp(48px,7vw,84px) clamp(18px,4vw,40px) clamp(30px,4vw,46px);
  display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.5fr);
  gap:clamp(28px,5vw,72px);
}
.footer__mark{
  font-size:clamp(24px,3vw,32px);font-weight:700;letter-spacing:-.02em;color:#fff;
}
.footer__tag{margin-top:8px;font-size:13px;letter-spacing:.14em;color:var(--orange-soft)}
.footer__lede{
  margin-top:18px;max-width:36ch;
  font-size:14px;line-height:1.85;color:rgba(232,238,246,.66);
}
.footer__cols{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:28px}
.footer__heading{
  font-size:12px;font-weight:600;letter-spacing:.16em;color:rgba(232,238,246,.5);
}
.footer__list{margin-top:10px;display:flex;flex-direction:column;gap:2px}
.footer__list a{
  display:inline-flex;align-items:center;min-height:44px;
  font-size:14.5px;color:rgba(232,238,246,.86);
  border-bottom:1px solid transparent;
  transition:color .2s ease,border-color .2s ease;
}
.footer__list a:hover{color:var(--orange-soft);border-bottom-color:rgba(255,138,61,.6)}
.footer__contact{
  max-width:var(--shell);margin-inline:auto;
  padding:clamp(20px,3vw,30px) clamp(18px,4vw,40px);
  border-top:1px solid rgba(232,238,246,.14);
}
.footer__contact-list{display:flex;flex-wrap:wrap;gap:14px 44px}
.footer__contact-row{display:flex;flex-wrap:wrap;align-items:baseline;gap:10px}
.footer__contact-row dt{
  font-size:11px;letter-spacing:.16em;color:rgba(232,238,246,.48);
}
.footer__contact-row dd{
  font-size:14px;color:rgba(232,238,246,.9);word-break:break-word;
}
.footer__base{
  max-width:var(--shell);margin-inline:auto;
  padding:18px clamp(18px,4vw,40px) 34px;
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:10px;
  border-top:1px solid rgba(232,238,246,.14);
}
.footer__copy,.footer__icp{font-size:12px;letter-spacing:.08em;color:rgba(232,238,246,.55)}
.footer__icp{color:rgba(232,238,246,.42)}

/* =========================================================
   断点：平板
   ========================================================= */
@media (max-width:899px){
  .bento{grid-template-columns:repeat(6,minmax(0,1fr))}
  .span-3,.span-4,.span-5,.span-6,.span-7,.span-8,.span-9,.span-12{grid-column:span 6}
  .media--offset{margin-right:0}
  .footer__top{grid-template-columns:1fr}
  .footer__cols{grid-template-columns:repeat(3,minmax(0,1fr))}
}

/* =========================================================
   断点：手机
   ========================================================= */
@media (max-width:599px){
  body{font-size:16px}
  .bento{grid-template-columns:1fr;row-gap:20px}
  .span-3,.span-4,.span-5,.span-6,.span-7,.span-8,.span-9,.span-12{grid-column:1/-1}
  .footer__cols{grid-template-columns:repeat(2,minmax(0,1fr));gap:22px}
  .footer__base{flex-direction:column;align-items:flex-start}
}

@media (min-width:420px) and (max-width:1023px){
  .bar__cta{display:inline-flex}
}

/* =========================================================
   断点：桌面（轨道导航）
   ========================================================= */
@media (min-width:1024px){
  body{padding-left:var(--rail-w);padding-top:var(--bar-h)}

  .site-header__bar{
    position:fixed;top:0;left:var(--rail-w);right:0;height:var(--bar-h);
    padding:0 34px;background:var(--paper);border-bottom:1px solid var(--line);
  }
  .bar__brand,.nav-toggle{display:none}
  .bar__status{display:inline-flex;font-size:12.5px;letter-spacing:.08em}

  .site-header__rail{
    top:0;bottom:0;width:var(--rail-w);
    transform:none;transition:none;
    padding:26px 20px 22px;
    z-index:80;
  }
  .site-header[data-open]::after{display:none}

  .footer__contact-list{gap:16px 56px}
}

/* =========================================================
   减少动效
   ========================================================= */
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  [data-reveal].is-visible{animation:none;opacity:1;transform:none}
  [data-filter-item][data-dim="true"]{transform:none}
  .card:hover{transform:none}
}