/* ============================================================
   乐竞体育 · 共享样式表  /assets/site.css
   深靛蓝夜场底 + 炽焰橙强调 · 侧边轨道导航 · 框景式章节节奏
   ============================================================ */

/* ---------- 1. 设计变量 ---------- */
:root{
  --ink:#0B1B3A;
  --ink-2:#142A55;
  --night:#08152C;
  --paper:#F4EFE6;
  --stone:#6E7787;
  --flame:#FF6B1A;
  --sand:#D9A441;
  --jade:#1F8A70;
  --clay:#C4552B;
  --moss:#4C6B4F;

  --paper-88:rgba(244,239,230,.88);
  --paper-70:rgba(244,239,230,.70);
  --paper-50:rgba(244,239,230,.50);
  --hair:rgba(244,239,230,.13);
  --hair-ink:rgba(11,27,58,.14);

  --font-display:"Bebas Neue","Oswald","Arial Narrow","Helvetica Neue","PingFang SC","Microsoft YaHei",sans-serif;
  --font-body:"PingFang SC","Hiragino Sans GB","Source Han Sans SC","Noto Sans CJK SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:"IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,"Courier New",monospace;

  --rail-w:236px;
  --rail-mini:76px;
  --rail:var(--rail-w);

  --ease:cubic-bezier(.22,.61,.36,1);
  --r-lg:28px;
  --r-md:18px;
  --r-pill:999px;
}
:root[data-rail="mini"]{ --rail:var(--rail-mini); }

/* ---------- 2. Reset ---------- */
*,*::before,*::after{ box-sizing:border-box; }
html{ -webkit-text-size-adjust:100%; scroll-behavior:smooth; }
body{
  margin:0;
  background:var(--ink);
  color:var(--paper);
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img,svg,video{ display:block; max-width:100%; }
h1,h2,h3,h4,h5{ margin:0; font-family:var(--font-display); font-weight:900; line-height:1.1; letter-spacing:.02em; }
p{ margin:0 0 1em; }
ul,ol{ margin:0; padding:0; }
button{ font:inherit; color:inherit; background:none; border:0; }
a{ color:inherit; }
table{ border-collapse:collapse; width:100%; }
::selection{ background:var(--flame); color:#fff; }

:focus-visible{
  outline:2px solid var(--flame);
  outline-offset:3px;
  border-radius:6px;
}

/* ---------- 3. 页面骨架 ---------- */
main,
#main-content,
.site-footer{ margin-left:var(--rail); }
@media (min-width:1025px){
  main,#main-content,.site-footer{ transition:margin-left .32s var(--ease); }
}

.wrap{
  width:100%;
  max-width:1240px;
  margin-inline:auto;
  padding-inline:clamp(20px,4.5vw,72px);
}
.wrap--narrow{ max-width:860px; }

.section{ position:relative; padding-block:clamp(56px,8vw,116px); }
.section--paper{ background:var(--paper); color:var(--ink); }
.section--paper .eyebrow{ color:var(--clay); }
.section--paper .eyebrow::before{ background:var(--clay); }
.section--night{ background:var(--ink-2); color:var(--paper); }

/* ---------- 4. 排版 ---------- */
.h-display{
  font-size:clamp(34px,5.6vw,68px);
  letter-spacing:.03em;
  text-transform:uppercase;
  line-height:1.04;
}
.h-section{
  font-size:clamp(26px,2.6vw,32px);
  letter-spacing:.02em;
  margin-bottom:.5em;
}
.h-card{
  font-size:20px;
  letter-spacing:.02em;
  margin-bottom:.4em;
}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--sand);
  margin:0 0 14px;
}
.eyebrow::before{
  content:"";
  width:26px;height:1px;
  background:var(--flame);
  flex:none;
}
.prose{ max-width:38em; color:var(--paper-88); }
.prose--wide{ max-width:52em; }
.prose p{ margin-bottom:1.15em; }
.prose ul,.prose ol{ padding-left:1.3em; margin-bottom:1.15em; }
.prose li{ margin-bottom:.4em; }
.section--paper .prose{ color:rgba(11,27,58,.86); }

/* ---------- 5. 通用组件 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  padding:14px 26px;
  border-radius:var(--r-pill);
  border:1px solid transparent;
  font-size:15px;
  font-weight:700;
  letter-spacing:.06em;
  text-decoration:none;
  cursor:pointer;
  transition:transform .2s var(--ease),background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease);
}
.btn--primary{ background:var(--flame); color:#fff; }
.btn--primary:hover{ background:#ff7f38; transform:translateY(-2px); }
.btn--ghost{ border-color:rgba(244,239,230,.30); color:var(--paper); }
.btn--ghost:hover{ border-color:var(--sand); color:var(--sand); transform:translateY(-2px); }
.btn--dark{ background:var(--ink); color:var(--paper); }
.btn--dark:hover{ background:var(--ink-2); transform:translateY(-2px); }

.chip{
  display:inline-flex;
  align-items:center;
  gap:8px;
  height:34px;
  padding:0 16px;
  border-radius:var(--r-pill);
  border:1px solid rgba(244,239,230,.24);
  background:rgba(244,239,230,.04);
  color:var(--paper-88);
  font-size:13px;
  letter-spacing:.04em;
  cursor:pointer;
  transition:background .18s var(--ease),border-color .18s var(--ease),color .18s var(--ease);
}
.chip:hover{ border-color:var(--sand); color:var(--paper); }
.chip--sm{ height:28px; padding:0 12px; font-size:12px; }
.chip--active{ background:var(--flame); border-color:var(--flame); color:#fff; }
.chip--jade{ border-color:rgba(31,138,112,.55); background:rgba(31,138,112,.12); color:#7fd8bf; }
.section--paper .chip{ border-color:var(--hair-ink); background:rgba(11,27,58,.03); color:rgba(11,27,58,.82); }
.section--paper .chip:hover{ border-color:var(--clay); color:var(--ink); }
.section--paper .chip--active{ background:var(--clay); border-color:var(--clay); color:#fff; }

.card{
  background:var(--paper);
  color:var(--ink);
  border:1px solid var(--hair-ink);
  border-radius:var(--r-lg);
  padding:clamp(20px,2.8vw,34px);
}
.card--night{
  background:var(--ink-2);
  color:var(--paper);
  border-color:var(--hair);
}

.grid{
  display:grid;
  gap:clamp(18px,2.4vw,32px);
  grid-template-columns:minmax(0,1fr);
}
.grid--2{ grid-template-columns:repeat(2,minmax(0,1fr)); }
.grid--3{ grid-template-columns:repeat(3,minmax(0,1fr)); }
@media (max-width:900px){
  .grid--2,.grid--3{ grid-template-columns:minmax(0,1fr); }
}

.score{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-size:clamp(40px,6vw,72px);
  line-height:1;
  color:var(--flame);
  letter-spacing:.02em;
}
.stat{ display:flex; flex-direction:column; gap:6px; }
.stat__num{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-size:clamp(28px,3.6vw,44px);
  line-height:1;
  color:var(--sand);
}
.stat__label{
  font-size:13px;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--stone);
}

.rule{
  display:block;
  width:100%;
  height:1px;
  border:0;
  background:rgba(244,239,230,.22);
}
.rule--sand{ background:var(--sand); opacity:.6; }
.rule--ink{ background:var(--hair-ink); }

.breadcrumb{
  font-size:13px;
  letter-spacing:.04em;
  color:var(--stone);
}
.breadcrumb ol{
  list-style:none;
  display:flex;
  flex-wrap:wrap;
  gap:6px;
  align-items:center;
}
.breadcrumb li{ display:flex; align-items:center; gap:6px; }
.breadcrumb li + li::before{
  content:"/";
  color:rgba(110,119,135,.65);
}
.breadcrumb a{ text-decoration:none; }
.breadcrumb a:hover{ color:var(--flame); }
.breadcrumb [aria-current="page"]{ color:var(--paper); }
.section--paper .breadcrumb [aria-current="page"]{ color:var(--ink); }

/* ---------- 6. 图片容器基础（页面阶段直接放 <img>） ---------- */
.media{
  position:relative;
  overflow:hidden;
  border-radius:var(--r-lg);
  background:linear-gradient(140deg,#142A55 0%,#0B1B3A 58%,#2a1206 100%);
  isolation:isolate;
}
.media::after{
  content:"";
  position:absolute;
  inset:0;
  background-image:
    linear-gradient(rgba(244,239,230,.09) 1px,transparent 1px),
    linear-gradient(90deg,rgba(244,239,230,.09) 1px,transparent 1px);
  background-size:48px 48px;
  opacity:.55;
  pointer-events:none;
}
.media > img{
  position:relative;
  z-index:1;
  width:100%;
  height:100%;
  object-fit:cover;
}
.media--16x9{ aspect-ratio:16 / 9; }
.media--4x3{ aspect-ratio:4 / 3; }
.media--1x1{ aspect-ratio:1 / 1; }
.media--tall{ aspect-ratio:3 / 4; }
.media--tilt{ transform:rotate(-1.8deg); }
.media__caption{
  margin-top:10px;
  font-size:13px;
  letter-spacing:.04em;
  color:var(--stone);
}

/* ---------- 7. 头部：左侧固定轨道 ---------- */
.skip-link{
  position:fixed;
  left:16px;
  top:-70px;
  z-index:200;
  padding:10px 20px;
  border-radius:var(--r-pill);
  background:var(--flame);
  color:#fff;
  font-size:14px;
  font-weight:700;
  text-decoration:none;
  transition:top .2s var(--ease);
}
.skip-link:focus{ top:14px; }

.site-rail{
  position:fixed;
  top:0;left:0;bottom:0;
  z-index:90;
  width:var(--rail);
  display:flex;
  flex-direction:column;
  gap:24px;
  padding:26px 18px 22px;
  background:
    radial-gradient(120% 55% at 0% 0%,rgba(255,107,26,.16),rgba(255,107,26,0) 62%),
    linear-gradient(180deg,#0B1B3A 0%,#142A55 100%);
  border-right:1px solid var(--hair);
  transition:width .32s var(--ease),padding .32s var(--ease);
}

.rail-head{
  display:flex;
  flex-direction:column;
  gap:8px;
}

.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  color:var(--paper);
  text-decoration:none;
}
.brand-mark{
  width:26px;
  height:26px;
  flex:none;
  border-radius:9px;
  background:linear-gradient(135deg,var(--flame),var(--sand));
  box-shadow:0 0 0 4px rgba(255,107,26,.14);
}
.brand-text{
  font-family:var(--font-display);
  font-size:19px;
  font-weight:900;
  letter-spacing:.10em;
}

.season-tag{
  display:inline-flex;
  align-items:center;
  gap:8px;
  margin:0;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.10em;
  color:var(--paper-70);
}
.status-dot{
  width:7px;
  height:7px;
  flex:none;
  border-radius:50%;
  background:var(--jade);
  animation:breathe 2.4s ease-in-out infinite;
}
@keyframes breathe{
  0%,100%{ opacity:1; }
  50%{ opacity:.32; }
}

.rail-toggle{
  align-self:flex-start;
  width:36px;
  height:36px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  border-radius:12px;
  border:1px solid var(--hair);
  background:rgba(244,239,230,.04);
  cursor:pointer;
  transition:border-color .2s var(--ease),background .2s var(--ease);
}
.rail-toggle:hover{ border-color:rgba(217,164,65,.65); background:rgba(217,164,65,.10); }
.rail-toggle-bar{
  position:relative;
  width:14px;
  height:2px;
  border-radius:2px;
  background:var(--sand);
}
.rail-toggle-bar::before,
.rail-toggle-bar::after{
  content:"";
  position:absolute;
  left:0;
  width:14px;
  height:2px;
  border-radius:2px;
  background:var(--sand);
}
.rail-toggle-bar::before{ top:-5px; }
.rail-toggle-bar::after{ top:5px; }

.nav-toggle{
  display:none;
  align-items:center;
  gap:9px;
  padding:9px 16px;
  border-radius:var(--r-pill);
  border:1px solid rgba(244,239,230,.25);
  background:rgba(244,239,230,.05);
  color:var(--paper);
  font-size:13px;
  letter-spacing:.10em;
  cursor:pointer;
  transition:border-color .2s var(--ease),background .2s var(--ease);
}
.nav-toggle:hover{ border-color:var(--sand); }
.nav-toggle-lines{
  position:relative;
  width:16px;
  height:10px;
  flex:none;
}
.nav-toggle-lines::before,
.nav-toggle-lines::after{
  content:"";
  position:absolute;
  left:0;
  width:16px;
  height:2px;
  border-radius:2px;
  background:var(--sand);
  transition:transform .22s var(--ease);
}
.nav-toggle-lines::before{ top:0; }
.nav-toggle-lines::after{ bottom:0; }
.site-rail[data-open] .nav-toggle-lines::before{ transform:translateY(4px) rotate(45deg); }
.site-rail[data-open] .nav-toggle-lines::after{ transform:translateY(-4px) rotate(-45deg); }

.rail-nav{ flex:1 1 auto; }
.rail-list{
  list-style:none;
  display:flex;
  flex-direction:column;
  gap:4px;
}
.rail-link{
  position:relative;
  display:flex;
  align-items:center;
  gap:12px;
  padding:11px 13px;
  border-radius:var(--r-pill);
  border:1px solid transparent;
  color:var(--paper-70);
  font-size:15px;
  letter-spacing:.03em;
  text-decoration:none;
  transition:color .2s var(--ease),background .2s var(--ease),border-color .2s var(--ease);
}
.rail-link:hover{
  color:var(--paper);
  background:rgba(244,239,230,.06);
}
.rail-num{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.06em;
  color:var(--stone);
  flex:none;
  transition:color .2s var(--ease);
}
.rail-link[aria-current="page"],
.rail-link.is-active{
  color:var(--paper);
  background:linear-gradient(90deg,rgba(255,107,26,.22),rgba(255,107,26,0));
  border-color:rgba(255,107,26,.38);
}
.rail-link[aria-current="page"] .rail-num,
.rail-link.is-active .rail-num{ color:var(--flame); }
.rail-link[aria-current="page"]::after,
.rail-link.is-active::after{
  content:"";
  width:7px;
  height:7px;
  margin-left:auto;
  flex:none;
  border-radius:50%;
  background:var(--flame);
  box-shadow:0 0 0 4px rgba(255,107,26,.16);
}

.rail-foot{
  display:flex;
  flex-direction:column;
  gap:14px;
}
.rail-progress{
  height:3px;
  border-radius:var(--r-pill);
  background:rgba(244,239,230,.13);
  overflow:hidden;
}
.rail-progress-fill{
  display:block;
  height:100%;
  width:100%;
  transform:scaleX(0);
  transform-origin:left center;
  background:linear-gradient(90deg,var(--flame),var(--sand));
  transition:transform .12s linear;
}
.rail-cta{
  display:flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:13px 18px;
  border-radius:var(--r-pill);
  background:var(--flame);
  color:#fff;
  font-size:14px;
  font-weight:700;
  letter-spacing:.10em;
  text-decoration:none;
  transition:background .2s var(--ease),transform .2s var(--ease);
}
.rail-cta:hover{ background:#ff7f38; transform:translateY(-2px); }

/* 窄轨状态 */
:root[data-rail="mini"] .site-rail{ padding-inline:12px; }
:root[data-rail="mini"] .rail-head{ align-items:center; }
:root[data-rail="mini"] .brand-text,
:root[data-rail="mini"] .season-tag,
:root[data-rail="mini"] .rail-label,
:root[data-rail="mini"] .rail-cta-label{ display:none; }
:root[data-rail="mini"] .rail-toggle{ align-self:center; }
:root[data-rail="mini"] .rail-link{ justify-content:center; padding:12px 0; }
:root[data-rail="mini"] .rail-link::after{ display:none; }
:root[data-rail="mini"] .rail-num{ font-size:12px; }
:root[data-rail="mini"] .rail-cta{
  width:46px;
  height:46px;
  padding:0;
  align-self:center;
}
:root[data-rail="mini"] .rail-cta::after{
  content:"→";
  font-size:17px;
  line-height:1;
}

/* ---------- 8. 页脚 ---------- */
.site-footer{
  background:var(--night);
  border-top:1px solid rgba(217,164,65,.55);
  padding-top:clamp(46px,6vw,86px);
}
.footer-inner{
  width:100%;
  max-width:1240px;
  margin-inline:auto;
  padding-inline:clamp(20px,4.5vw,72px);
  display:grid;
  grid-template-columns:minmax(240px,1.25fr) minmax(200px,.9fr) minmax(230px,1fr);
  gap:clamp(28px,4vw,64px);
}
.footer-col{ min-width:0; }
.footer-heading{
  margin:0 0 16px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.20em;
  text-transform:uppercase;
  color:var(--sand);
}
.footer-brand .brand{ margin-bottom:16px; }
.footer-lede{
  max-width:26em;
  margin:0;
  font-size:15px;
  line-height:1.8;
  color:var(--paper-70);
}
.footer-links ul{
  list-style:none;
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:10px 20px;
}
.footer-links a{
  font-size:15px;
  color:var(--paper-70);
  text-decoration:none;
  transition:color .2s var(--ease);
}
.footer-links a:hover{ color:var(--flame); }
.footer-contact ul{
  list-style:none;
  display:flex;
  flex-direction:column;
  gap:16px;
}
.footer-key{
  display:block;
  margin-bottom:4px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--stone);
}
.footer-value{
  display:block;
  font-size:14px;
  line-height:1.7;
  color:var(--paper-70);
}
.copy-chip{
  padding:0;
  border-bottom:1px dashed rgba(244,239,230,.34);
  background:none;
  font-size:14px;
  line-height:1.6;
  text-align:left;
  color:var(--paper);
  cursor:pointer;
  transition:color .2s var(--ease),border-color .2s var(--ease);
}
.copy-chip:hover{ color:var(--sand); border-color:var(--sand); }
.copy-chip.is-done{ color:var(--jade); border-color:var(--jade); }

.footer-base{
  max-width:1240px;
  margin:clamp(36px,5vw,64px) auto 0;
  padding:22px clamp(20px,4.5vw,72px) 32px;
  border-top:1px solid rgba(217,164,65,.42);
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:10px 28px;
  font-size:13px;
  color:var(--paper-50);
}
.footer-icp{
  margin:0;
  font-family:var(--font-mono);
  letter-spacing:.06em;
}
.footer-copy{ margin:0; }

/* ---------- 9. 进出场动效协议 ---------- */
.has-js [data-reveal]{
  opacity:0;
  transform:translateY(12px);
  transition:opacity .32s var(--ease),transform .32s var(--ease);
}
.has-js [data-reveal].is-in{ opacity:1; transform:none; }

.has-js [data-rule]{
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .42s var(--ease);
}
.has-js [data-rule].is-in{ transform:scaleX(1); }

.is-hidden{ display:none !important; }

/* ---------- 10. 平板与移动端 ---------- */
@media (max-width:1024px){
  :root,
  :root[data-rail="mini"]{ --rail:0px; }

  .site-rail{
    position:sticky;
    top:0;left:0;right:0;bottom:auto;
    width:100%;
    flex-direction:row;
    align-items:center;
    justify-content:space-between;
    gap:14px;
    padding:10px 16px;
    border-right:0;
    border-bottom:1px solid var(--hair);
    background:linear-gradient(120deg,#0B1B3A 0%,#142A55 100%);
  }
  .rail-head{
    flex-direction:row;
    align-items:center;
    gap:12px;
  }
  .rail-toggle{ display:none; }
  .rail-foot{ display:none; }
  .nav-toggle{ display:inline-flex; }

  .rail-nav{
    position:absolute;
    top:100%;
    left:0;
    right:0;
    padding:12px 16px 20px;
    background:var(--ink);
    border-bottom:1px solid rgba(217,164,65,.42);
    box-shadow:0 20px 44px rgba(0,0,0,.46);
    max-height:calc(100vh - 68px);
    overflow-y:auto;
    opacity:0;
    visibility:hidden;
    transform:translateY(-10px);
    pointer-events:none;
    transition:opacity .22s var(--ease),transform .22s var(--ease),visibility .22s;
  }
  .site-rail[data-open] .rail-nav{
    opacity:1;
    visibility:visible;
    transform:none;
    pointer-events:auto;
  }
  .rail-link{ padding:14px 14px; font-size:16px; }
  .brand-text{ font-size:17px; }
  .season-tag{ font-size:11px; }
}

@media (max-width:900px){
  .footer-inner{
    grid-template-columns:minmax(0,1fr);
  }
  .footer-links ul{ grid-template-columns:repeat(2,minmax(0,1fr)); }
}

@media (max-width:560px){
  body{ font-size:16px; }
  .h-display{ font-size:34px; }
  .footer-links ul{ grid-template-columns:minmax(0,1fr); }
  .footer-base{ justify-content:flex-start; }
}

/* ---------- 11. 无障碍与动效降级 ---------- */
@media (prefers-reduced-motion:reduce){
  html{ scroll-behavior:auto; }
  *,*::before,*::after{
    animation-duration:.01ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.01ms !important;
  }
  .has-js [data-reveal]{ opacity:1; transform:none; }
  .has-js [data-rule]{ transform:scaleX(1); }
  .rail-progress-fill{ transition:none; }
}