/* ==========================================================
   乐竞官网 · 共享站点样式 /assets/site.css
   竞技场深蓝黑底 + 电子青秩序 + 荧光橙热度
   桌面端：左侧 104px 计分牌窄栏 + 右侧叙事长卷
   移动端：顶部悬浮条 + 底部动作坞
   ========================================================== */

/* ---------- 1. 设计令牌 ---------- */
:root{
  --arena:#060B16;
  --board:#0F1A2E;
  --board-2:#152341;
  --line:#1C2740;
  --cyan:#2BE3D2;
  --cyan-soft:#7CF3E7;
  --orange:#FF6A1F;
  --orange-soft:#FFA766;
  --ink:#E9EDF3;
  --ink-soft:rgba(233,237,243,.86);
  --muted:#A7B2C4;
  --up:#36D68C;
  --down:#FF5566;

  --rail-w:104px;
  --header-h:64px;
  --maxw:1180px;
  --pad-x:clamp(18px,4vw,64px);
  --gap:clamp(16px,2.4vw,28px);

  --r-lg:26px;
  --r-md:16px;
  --r-sm:10px;
  --r-pill:999px;

  --font-sans:"PingFang SC","Hiragino Sans GB","Source Han Sans SC","Noto Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-display:"Barlow Condensed","PingFang SC","Source Han Sans SC","Noto Sans SC",system-ui,sans-serif;
  --font-mono:"JetBrains Mono","IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;

  --shadow-card:0 24px 48px -30px rgba(0,0,0,.9);
}

/* ---------- 2. Reset ---------- */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%;scroll-behavior:smooth;}
body,h1,h2,h3,h4,h5,p,ul,ol,li,figure,figcaption,blockquote,dl,dt,dd{margin:0;padding:0;}
ul,ol{list-style:none;}
img,svg,video{max-width:100%;display:block;}
button,input,select,textarea{font:inherit;color:inherit;}
a{color:inherit;text-decoration:none;}

/* ---------- 3. 中文排版与页面基底 ---------- */
body{
  min-height:100vh;
  background:var(--arena);
  color:var(--ink);
  font-family:var(--font-sans);
  font-size:17px;
  line-height:1.75;
  letter-spacing:.01em;
  padding-block-start:calc(var(--header-h) + 8px);
  padding-block-end:96px;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{font-family:var(--font-display);font-weight:900;line-height:1.1;letter-spacing:-.03em;}
p{text-wrap:pretty;}
::selection{background:var(--cyan);color:#04121A;}

.display-1{
  font-family:var(--font-display);
  font-weight:900;
  font-size:clamp(48px,9vw,132px);
  line-height:.94;
  letter-spacing:-.04em;
  margin:0;
}
.numeric{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  letter-spacing:-.01em;
}

/* ---------- 4. 焦点与可达性 ---------- */
:focus-visible{outline:2px solid var(--cyan-soft);outline-offset:3px;border-radius:6px;}
.skip-link{
  position:fixed;top:8px;left:8px;z-index:130;
  padding:10px 18px;border-radius:var(--r-pill);
  background:var(--cyan);color:#04121A;font-weight:700;font-size:14px;
  transform:translateY(-160%);
  transition:transform .18s ease;
}
.skip-link:focus{transform:none;}
#main-content{scroll-margin-top:calc(var(--header-h) + 16px);}

/* ---------- 5. 头部：移动端顶部条（基础形态） ---------- */
.site-header{
  position:fixed;z-index:90;top:0;left:0;right:0;
  display:flex;align-items:center;gap:12px;
  min-height:var(--header-h);
  padding:8px clamp(12px,4vw,20px);
  background:rgba(6,11,22,.96);
  border-bottom:1px solid var(--line);
  transition:min-height .2s ease,padding .2s ease;
}
.site-header[data-condensed]{min-height:52px;padding-block:6px;}

/* 品牌 */
.brand{display:flex;align-items:center;gap:10px;min-width:0;color:var(--ink);}
.brand__mark{
  flex:0 0 auto;display:grid;place-items:center;
  width:38px;height:38px;border-radius:12px;
  font-family:var(--font-mono);font-weight:700;font-size:15px;letter-spacing:.02em;
  color:var(--cyan);background:rgba(43,227,210,.1);
  border:1px solid rgba(43,227,210,.45);
}
.brand__text{display:flex;flex-direction:column;min-width:0;}
.brand__name{font-family:var(--font-display);font-weight:900;font-size:17px;letter-spacing:-.02em;line-height:1.15;}
.brand__tagline{font-size:11px;line-height:1.35;color:var(--muted);letter-spacing:.04em;}
@media (max-width:479px){.site-header .brand__tagline{display:none;}}

/* 移动导航按钮 */
.nav-toggle{
  margin-inline-start:auto;
  display:inline-flex;align-items:center;gap:8px;
  padding:9px 14px;border-radius:var(--r-pill);
  background:rgba(15,26,46,.92);color:var(--ink);
  border:1px solid rgba(43,227,210,.35);
  font-size:13px;letter-spacing:.06em;cursor:pointer;
  transition:background .18s ease,color .18s ease,border-color .18s ease;
}
.nav-toggle__bars{
  position:relative;display:block;width:16px;height:2px;border-radius:2px;
  background:var(--cyan);
  box-shadow:0 -5px 0 var(--cyan),0 5px 0 var(--cyan);
  transition:transform .18s ease,box-shadow .18s ease,background .18s ease;
}
.nav-toggle__label{font-weight:700;}
.nav-toggle[aria-expanded="true"]{background:var(--cyan);color:#04121A;border-color:var(--cyan);}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars{background:transparent;box-shadow:none;transform:rotate(45deg);}

/* 导航：移动端浮层 */
.nav{
  position:fixed;z-index:95;
  top:calc(var(--header-h) + 10px);
  left:clamp(10px,3vw,20px);right:clamp(10px,3vw,20px);
  padding:14px;
  background:rgba(15,26,46,.97);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  box-shadow:var(--shadow-card);
  opacity:0;visibility:hidden;transform:translateY(-10px);
  transition:opacity .22s ease,transform .22s ease,visibility .22s;
  max-height:calc(100vh - var(--header-h) - 44px);
  overflow:auto;
  overscroll-behavior:contain;
}
.nav[data-open]{opacity:1;visibility:visible;transform:none;}
html[data-nav-open] body{overflow:hidden;}
.nav__list{display:grid;gap:4px;counter-reset:nav-i;}
.nav__item{counter-increment:nav-i;}
.nav__link{
  display:flex;align-items:center;gap:12px;
  padding:12px 14px;border-radius:var(--r-md);
  color:var(--ink);font-weight:600;font-size:15.5px;letter-spacing:.02em;
  transition:background .18s ease,color .18s ease;
}
.nav__link::before{
  content:counter(nav-i,decimal-leading-zero);
  font-family:var(--font-mono);font-size:11px;letter-spacing:.08em;color:var(--muted);
}
.nav__link:hover{background:rgba(43,227,210,.12);color:var(--cyan-soft);}
.nav__link[aria-current="page"]{background:var(--cyan);color:#04121A;}
.nav__link[aria-current="page"]::before{color:rgba(4,18,26,.65);}

/* 操作坞（基础静态形态） */
.rail-actions{display:flex;align-items:center;gap:10px;margin-inline-start:auto;}
.rail-cta,.rail-save{flex:0 0 auto;}
.util-list{display:flex;flex-wrap:wrap;gap:6px 10px;}
.util-link{
  display:inline-block;padding:6px 11px;border-radius:var(--r-pill);
  background:rgba(28,39,64,.75);color:var(--muted);
  font-size:12px;letter-spacing:.06em;
  transition:color .18s ease,background .18s ease;
}
.util-link:hover{color:var(--cyan-soft);background:rgba(43,227,210,.14);}
.save-receipt{
  margin:0;padding:8px 11px;border-radius:12px;
  background:rgba(43,227,210,.12);color:var(--cyan-soft);
  font-size:11.5px;line-height:1.5;letter-spacing:.02em;
}
.save-receipt[hidden]{display:none;}

/* ---------- 6. 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 18px;border-radius:var(--r-pill);border:1px solid transparent;
  font-family:var(--font-sans);font-size:14px;font-weight:700;letter-spacing:.02em;line-height:1.25;
  cursor:pointer;text-align:center;
  transition:background .18s ease,color .18s ease,border-color .18s ease;
}
.btn--primary{background:var(--cyan);color:#04121A;}
.btn--primary:hover{background:linear-gradient(120deg,var(--cyan),var(--cyan-soft) 62%,var(--orange-soft));}
.btn--ghost{background:rgba(15,26,46,.9);color:var(--ink);border-color:var(--line);}
.btn--ghost:hover{border-color:var(--cyan);color:var(--cyan-soft);}
.btn--hot{background:var(--orange);color:#160800;}
.btn--hot:hover{background:var(--orange-soft);}
.rail-save[aria-pressed="true"]{background:rgba(43,227,210,.16);border-color:var(--cyan);color:var(--cyan-soft);}

/* ---------- 7. 滚动进度 ---------- */
.scroll-progress{
  position:fixed;z-index:100;top:0;left:0;right:0;height:3px;
  background:rgba(28,39,64,.7);pointer-events:none;
}
.scroll-progress__bar{
  display:block;height:100%;width:0;
  background:var(--cyan);
  box-shadow:0 0 12px rgba(43,227,210,.7);
}

/* ---------- 8. 头部：桌面端计分牌窄栏 ---------- */
@media (min-width:1024px){
  body{
    padding-block-start:0;
    padding-block-end:0;
    padding-inline-start:var(--rail-w);
  }
  .skip-link{left:calc(var(--rail-w) + 12px);}
  .scroll-progress{left:var(--rail-w);}
  .site-header{
    top:0;bottom:0;left:0;right:auto;
    width:var(--rail-w);height:100%;min-height:0;
    flex-direction:column;flex-wrap:nowrap;align-items:stretch;
    gap:14px;padding:18px 10px 16px;
    background:rgba(6,11,22,.96);
    border-bottom:0;border-right:1px solid var(--line);
  }
  .site-header[data-condensed]{min-height:0;padding-block:18px 16px;}
  .site-header .brand{flex-direction:column;gap:8px;text-align:center;}
  .site-header .brand__text{align-items:center;}
  .site-header .brand__name{font-size:15px;}
  .site-header .brand__tagline{display:block;font-size:10px;line-height:1.45;letter-spacing:.06em;}
  .nav-toggle{display:none;}
  .site-header .nav{
    position:static;inset:auto;z-index:auto;
    flex:1 1 auto;min-height:0;max-height:none;
    overflow-y:auto;overflow-x:hidden;
    padding:14px 4px;
    opacity:1;visibility:visible;transform:none;
    background:rgba(15,26,46,.9);
    border:1px solid rgba(43,227,210,.18);
    border-radius:var(--r-pill);
    box-shadow:inset 0 1px 0 rgba(233,237,243,.05);
    backdrop-filter:blur(10px);
    scrollbar-width:thin;
  }
  .site-header .nav__list{gap:6px;justify-items:center;}
  .site-header .nav__link{
    display:block;width:auto;margin:0 auto;
    padding:9px 6px;border-radius:var(--r-pill);
    writing-mode:vertical-rl;text-orientation:upright;
    font-size:13.5px;letter-spacing:.16em;line-height:1.1;font-weight:700;
  }
  .site-header .nav__link::before{display:none;}
  .site-header .rail-actions{
    flex-direction:column;align-items:stretch;gap:8px;margin:0;
  }
  .site-header .rail-cta{font-size:12.5px;padding:12px 6px;border-radius:var(--r-md);letter-spacing:0;line-height:1.35;}
  .site-header .rail-save{font-size:12px;padding:10px 6px;border-radius:var(--r-md);}
  .site-header .util-list{flex-direction:column;gap:6px;}
  .site-header .util-link{text-align:center;}
  .site-header .save-receipt{font-size:11px;}
}

/* ---------- 9. 操作坞：移动端底部动作条 ---------- */
@media (max-width:1023px){
  .rail-actions{
    position:fixed;z-index:88;left:0;right:0;bottom:0;margin:0;
    flex-wrap:wrap;gap:8px;
    padding:10px clamp(12px,4vw,20px) calc(10px + env(safe-area-inset-bottom,0px));
    background:rgba(6,11,22,.97);
    border-top:1px solid var(--line);
    backdrop-filter:blur(14px);
  }
  .rail-actions .btn{flex:1 1 42%;}
  .rail-actions .util-list{display:none;}
  .rail-actions .save-receipt{flex:1 0 100%;}
}

/* ---------- 10. 页脚 ---------- */
.site-footer{
  margin-block-start:clamp(48px,8vw,120px);
  background:var(--board);
  border-top:1px solid var(--line);
  color:var(--ink);
}
.footer__stripe{display:flex;width:100%;height:8px;overflow:hidden;}
.stripe__seg{display:block;height:100%;}
.stripe__seg--hot{flex:0 0 16%;background:var(--orange);}
.stripe__seg--warm{flex:0 0 7%;background:var(--orange-soft);}
.stripe__seg--deep{flex:0 0 22%;background:var(--line);}
.stripe__seg--cool{flex:1 1 auto;background:var(--cyan);}

.footer__inner{
  width:min(100%,var(--maxw));
  margin-inline:auto;
  padding:clamp(32px,5vw,64px) var(--pad-x) clamp(24px,4vw,48px);
  display:grid;gap:clamp(28px,4vw,48px);
  grid-template-columns:1fr;
}
.footer__brand{display:grid;gap:16px;align-content:start;}
.brand--footer{flex-direction:row;align-items:center;gap:12px;}
.brand--footer .brand__mark{width:44px;height:44px;font-size:17px;border-radius:14px;}
.brand--footer .brand__name{font-size:20px;}
.brand--footer .brand__tagline{font-size:12px;color:var(--muted);}
.footer__note{font-size:13.5px;line-height:1.7;color:var(--muted);max-width:44ch;}
.footer__note--small{font-size:12.5px;line-height:1.65;color:rgba(167,178,196,.85);}

.footer__nav{display:grid;gap:clamp(20px,3vw,32px);grid-template-columns:repeat(auto-fit,minmax(130px,1fr));}
.footer__col{min-width:0;}
.footer__title{
  display:flex;align-items:center;gap:8px;
  margin-block-end:14px;
  font-family:var(--font-mono);font-size:12px;font-weight:700;letter-spacing:.16em;color:var(--muted);
}
.footer__title::before{
  content:"";flex:0 0 auto;width:9px;height:9px;border-radius:3px;background:var(--cyan);
}
.footer__col--help .footer__title::before{background:var(--orange);}
.footer__col--about .footer__title::before{background:var(--muted);}
.footer__contact .footer__title::before{background:var(--orange-soft);}
.footer__list{display:grid;gap:4px;}
.footer__link{
  display:inline-block;padding:4px 0;font-size:15px;color:var(--ink);
  transition:color .18s ease;
}
.footer__link:hover{color:var(--cyan-soft);}

.footer__contact{display:grid;gap:16px;align-content:start;}
.contact-list{display:grid;gap:12px;}
.contact-list__item{display:grid;gap:2px;}
.contact-list__label{font-family:var(--font-mono);font-size:11px;letter-spacing:.16em;color:var(--muted);}
.contact-list__value{font-size:14.5px;line-height:1.6;color:var(--ink);word-break:break-word;}

.footer__legal{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px 24px;
  width:min(100%,var(--maxw));margin-inline:auto;
  padding:18px var(--pad-x) 30px;
  border-top:1px solid var(--line);
}
.footer__copy{font-size:12.5px;color:var(--muted);letter-spacing:.02em;}
.legal-links{display:flex;flex-wrap:wrap;gap:8px 18px;}
.legal-link{font-size:12.5px;color:var(--muted);transition:color .18s ease;}
.legal-link:hover{color:var(--cyan-soft);}

@media (min-width:700px){
  .footer__inner{grid-template-columns:repeat(2,1fr);}
  .footer__brand{grid-column:1 / -1;}
  .footer__contact{grid-column:1 / -1;}
}
@media (min-width:1024px){
  .footer__inner{grid-template-columns:minmax(230px,1.1fr) minmax(0,1.7fr) minmax(250px,1.05fr);}
  .footer__brand{grid-column:auto;}
  .footer__contact{grid-column:auto;}
}

/* ---------- 11. 版心、章节、网格 ---------- */
.container{width:min(100%,var(--maxw));margin-inline:auto;padding-inline:var(--pad-x);}
.section{position:relative;padding-block:clamp(56px,9vw,136px);}
.section--tight{padding-block:clamp(36px,5vw,72px);}
.section--board{background:var(--board);}
.section__head{display:grid;gap:14px;max-width:72ch;margin-block-end:clamp(28px,4vw,48px);}
.section__index{
  font-family:var(--font-mono);font-size:clamp(12px,1.1vw,14px);
  letter-spacing:.22em;color:var(--cyan);
}
.section__band{display:flex;gap:6px;width:min(240px,42%);height:6px;border-radius:var(--r-pill);overflow:hidden;background:var(--line);}
.section__band > i{display:block;height:100%;}
.section__band > i:first-child{width:34%;background:var(--orange);}
.section__band > i:last-child{flex:1 1 auto;background:var(--cyan);}
.section__title{font-size:clamp(28px,4vw,56px);letter-spacing:-.04em;line-height:1.04;margin:0;}
.lede{font-size:clamp(17px,1.5vw,20px);line-height:1.7;color:var(--muted);max-width:62ch;}

.stack{display:grid;gap:var(--gap);}
.stack--tight{display:grid;gap:10px;}
.grid{display:grid;gap:var(--gap);grid-template-columns:1fr;}
@media (min-width:720px){
  .grid--2{grid-template-columns:repeat(2,minmax(0,1fr));}
  .grid--3{grid-template-columns:repeat(2,minmax(0,1fr));}
}
@media (min-width:1024px){
  .grid--3{grid-template-columns:repeat(3,minmax(0,1fr));}
  .grid--split{grid-template-columns:1.6fr 1fr;}
}

/* ---------- 12. 卡片与数据组件 ---------- */
.card{
  display:grid;gap:12px;align-content:start;
  padding:clamp(18px,2.4vw,28px);
  background:var(--board);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
}
.card__title{font-size:clamp(20px,2vw,24px);line-height:1.2;letter-spacing:-.02em;margin:0;}
.card__meta{font-family:var(--font-mono);font-size:12px;letter-spacing:.1em;color:var(--muted);}
.card__body{font-size:16px;line-height:1.75;color:var(--ink-soft);}
.card__foot{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-size:13px;color:var(--muted);}

.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 11px;border-radius:var(--r-pill);
  background:rgba(28,39,64,.9);border:1px solid var(--line);color:var(--muted);
  font-size:12px;font-weight:700;letter-spacing:.04em;line-height:1.5;
}
.tag--hot{background:rgba(255,106,31,.16);border-color:rgba(255,106,31,.42);color:var(--orange-soft);}
.tag--cool{background:rgba(43,227,210,.14);border-color:rgba(43,227,210,.36);color:var(--cyan-soft);}
.tag--up{background:rgba(54,214,140,.14);border-color:rgba(54,214,140,.36);color:var(--up);}
.tag--down{background:rgba(255,85,102,.14);border-color:rgba(255,85,102,.36);color:var(--down);}

.delta{font-family:var(--font-mono);font-size:13px;font-weight:700;letter-spacing:.02em;}
.delta--up{color:var(--up);}
.delta--down{color:var(--down);}

.kpi{display:grid;gap:4px;}
.kpi__value{font-family:var(--font-mono);font-size:clamp(28px,4vw,44px);font-weight:700;line-height:1.05;letter-spacing:-.02em;color:var(--cyan);}
.kpi__label{font-size:12px;letter-spacing:.14em;color:var(--muted);}

.callout{
  padding:clamp(18px,2.4vw,26px);
  background:rgba(43,227,210,.08);
  border:1px solid rgba(43,227,210,.28);
  border-radius:var(--r-lg);
  color:var(--ink-soft);
  font-size:15.5px;line-height:1.75;
}

/* ---------- 13. 图像容器 ---------- */
.media-frame{
  position:relative;display:block;overflow:hidden;
  aspect-ratio:16 / 10;
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  background:var(--board-2);
}
.media-frame--wide{aspect-ratio:21 / 9;}
.media-frame--tall{aspect-ratio:4 / 5;}
.media-frame__img{width:100%;height:100%;object-fit:cover;display:block;}
.media-frame__caption{
  position:absolute;left:0;right:0;bottom:0;
  padding:12px 16px;
  background:rgba(6,11,22,.82);
  color:var(--muted);
  font-family:var(--font-mono);font-size:12.5px;letter-spacing:.04em;line-height:1.5;
}

/* ---------- 14. 折叠组 ---------- */
.accordion{display:grid;}
.accordion__item{border-top:1px solid var(--line);}
.accordion__item:last-child{border-bottom:1px solid var(--line);}
.accordion__trigger{
  width:100%;display:flex;align-items:flex-start;justify-content:space-between;gap:16px;
  padding:20px 4px;background:none;border:0;text-align:left;
  color:var(--ink);font-family:var(--font-sans);font-size:17px;font-weight:700;line-height:1.5;
  cursor:pointer;
}
.accordion__trigger::after{
  content:"＋";flex:0 0 auto;
  font-family:var(--font-mono);font-size:18px;color:var(--cyan);
}
.accordion__trigger[aria-expanded="true"]::after{content:"－";color:var(--orange);}
.accordion__panel{padding:0 4px 24px;color:var(--ink-soft);font-size:15.5px;line-height:1.8;}
.accordion__panel[hidden]{display:none;}

/* ---------- 15. 面包屑与正文 ---------- */
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  padding-block:16px;
  font-size:13px;letter-spacing:.02em;color:var(--muted);
}
.breadcrumb__link{color:var(--muted);transition:color .18s ease;}
.breadcrumb__link:hover{color:var(--cyan-soft);}
.breadcrumb__item{color:var(--muted);}
.breadcrumb__item[aria-current="page"]{color:var(--ink);}
.breadcrumb__sep{color:rgba(167,178,196,.45);}

.prose{max-width:74ch;font-size:16.5px;line-height:1.85;}
.prose h2{font-size:clamp(24px,3vw,36px);line-height:1.15;letter-spacing:-.03em;margin-block:1.6em .6em;}
.prose h3{font-size:21px;line-height:1.25;margin-block:1.4em .5em;}
.prose p{margin-block:0 1.1em;color:var(--ink-soft);}
.prose ul{margin-block:0 1.2em;}
.prose li{position:relative;padding-inline-start:20px;margin-block:0 8px;color:var(--ink-soft);}
.prose li::before{
  content:"";position:absolute;inset-inline-start:0;top:.72em;
  width:7px;height:7px;border-radius:2px;background:var(--cyan);
}
.prose a{color:var(--cyan);text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:3px;}
.prose a:hover{color:var(--cyan-soft);}

/* ---------- 16. 显现动效 ---------- */
html[data-reveal-ready] [data-reveal]{
  opacity:0;transform:translateY(18px);
  transition:opacity .5s ease,transform .5s ease;
}
html[data-reveal-ready] [data-reveal][data-revealed]{opacity:1;transform:none;}

/* ---------- 17. 减弱动效 ---------- */
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{transition-duration:.01ms !important;animation-duration:.01ms !important;}
  html[data-reveal-ready] [data-reveal]{opacity:1;transform:none;}
}