/* ============================================================
   红蓝电竞 · 共享站点样式 /assets/site.css
   框架式导航 + 红蓝双色阵营 + 极简文字建筑
   ============================================================ */

/* ---------- 1. Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%}
body,h1,h2,h3,h4,h5,h6,p,figure,blockquote,dl,dd,ul,ol,fieldset,legend{margin:0;padding:0}
ul,ol{list-style:none}
img,svg,video,canvas{display:block;max-width:100%}
button,input,select,textarea{font:inherit;color:inherit;background:none;border:0}
button{cursor:pointer}
table{border-collapse:collapse;border-spacing:0;width:100%}
a{color:inherit;text-decoration:none}
[hidden]{display:none !important}

/* ---------- 2. 设计令牌 ---------- */
:root{
  --c-paper:#F3F0E9;
  --c-ink:#23262B;
  --c-stone:#6E7480;
  --c-red:#E4322B;
  --c-blue:#1B54D6;
  --c-cyan:#22E0CE;
  --c-violet:#2A1748;
  --c-moss:#4E6B4B;
  --c-clay:#B4623A;
  --c-white:#FFFFFF;

  --ink-08:rgba(35,38,43,.08);
  --ink-16:rgba(35,38,43,.16);
  --ink-56:rgba(35,38,43,.56);
  --paper-16:rgba(243,240,233,.16);
  --paper-56:rgba(243,240,233,.56);

  --line:1px solid var(--ink-16);

  --font-head:"HarmonyOS Sans SC","HarmonyOS Sans","Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-body:"Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-mono:"JetBrains Mono","Roboto Mono","Noto Sans Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;

  --rail-w:116px;
  --rail-top-h:56px;
  --wrap:1320px;
  --gap:24px;

  --t-fast:.18s;
  --t-mid:.32s;
}

/* ---------- 3. 基础排版 ---------- */
body{
  min-height:100vh;
  background:var(--c-paper);
  color:var(--c-ink);
  font-family:var(--font-body);
  font-size:17px;
  font-weight:400;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
::selection{background:var(--c-red);color:#fff}
h1,h2,h3,h4,h5,h6{
  font-family:var(--font-head);
  font-weight:800;
  letter-spacing:-.02em;
  line-height:1.16;
  color:var(--c-ink);
  margin:0 0 .5em;
}
h1{font-size:clamp(34px,5.4vw,64px)}
h2{font-size:clamp(26px,3.2vw,44px)}
h3{font-size:clamp(20px,2vw,32px)}
h4{font-size:20px}
h5{font-size:17px;letter-spacing:0}
p{margin:0 0 1.05em}
strong,b{font-weight:700}
small{font-size:13px}

/* ---------- 4. 布局与文字组件 ---------- */
.wrap{width:100%;max-width:var(--wrap);margin:0 auto;padding:0 20px}
.section{padding:52px 0;border-top:var(--line)}
.section--tight{padding:32px 0}
.section--flush{border-top:0}
.section--dark{background:var(--c-ink);color:var(--c-paper);border-top-color:var(--paper-16)}
.section--dark h2,.section--dark h3,.section--dark h4{color:#fff}
.section--night{background:var(--c-violet);color:var(--c-paper);border-top-color:var(--paper-16)}
.section--night h2,.section--night h3,.section--night h4{color:#fff}
.section__head{display:flex;flex-wrap:wrap;align-items:baseline;gap:12px 20px;margin-bottom:28px}
.section__head h2,.section__head h3{margin:0}

.grid{display:grid;gap:var(--gap)}
.grid--2{grid-template-columns:repeat(auto-fit,minmax(280px,1fr))}
.grid--3{grid-template-columns:repeat(auto-fit,minmax(220px,1fr))}
.grid--split{grid-template-columns:1fr}

.mesh{
  background-image:
    linear-gradient(var(--ink-08) 1px,transparent 1px),
    linear-gradient(90deg,var(--ink-08) 1px,transparent 1px);
  background-size:24px 24px;
}
.rule{height:1px;border:0;background:var(--ink-16);margin:36px 0}

.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.18em;
  text-transform:uppercase;color:var(--c-stone);
}
.eyebrow::before{content:"";width:18px;height:1px;background:var(--c-red);flex:none}

.lede{font-size:19px;line-height:1.8;color:var(--ink-56);max-width:34em}

.prose{max-width:38em}
.prose p{max-width:36em}
.prose ul,.prose ol{list-style:disc;padding-left:1.3em;margin:0 0 1.1em;max-width:36em}
.prose ol{list-style:decimal}
.prose li{margin-bottom:.4em}
.prose blockquote{margin:0 0 1.2em;padding:2px 0 2px 18px;border-left:3px solid var(--c-red);color:var(--ink-56)}

.link{position:relative;color:var(--c-blue);white-space:normal}
.link::after{
  content:"";position:absolute;left:50%;right:50%;bottom:-2px;height:1px;background:currentColor;
  transition:left var(--t-mid) ease,right var(--t-mid) ease;
}
.link:hover::after,.link:focus-visible::after{left:0;right:0}

/* ---------- 5. 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:10px 16px;border:1px solid var(--c-ink);border-radius:0;
  background:transparent;color:var(--c-ink);
  font-family:var(--font-head);font-size:14px;font-weight:700;letter-spacing:-.01em;
  transition:background var(--t-fast) ease,color var(--t-fast) ease,border-color var(--t-fast) ease;
}
.btn:hover{background:var(--c-ink);color:var(--c-paper);border-color:var(--c-ink)}
.btn--line{border-color:rgba(35,38,43,.38);color:var(--c-ink)}
.btn--line:hover{background:var(--c-ink);color:var(--c-paper);border-color:var(--c-ink)}
.btn--solid{background:var(--c-red);border-color:var(--c-red);color:#fff}
.btn--solid:hover{background:var(--c-blue);border-color:var(--c-blue);color:#fff}
.btn--ghost{background:transparent;border-color:var(--paper-56);color:var(--c-paper)}
.btn--ghost:hover{background:var(--c-paper);border-color:var(--c-paper);color:var(--c-ink)}

/* ---------- 6. 面板 / 标签 / 数据 ---------- */
.panel{background:var(--c-white);border:var(--line);padding:22px}
.panel--dark{background:var(--c-ink);border-color:var(--c-ink);color:var(--c-paper)}
.panel--night{background:var(--c-violet);border-color:var(--c-violet);color:var(--c-paper)}
.panel--red{background:var(--c-red);border-color:var(--c-red);color:#fff}
.panel--blue{background:var(--c-blue);border-color:var(--c-blue);color:#fff}
.panel--dark h3,.panel--night h3,.panel--red h3,.panel--blue h3{color:inherit}
.panel:focus-within{box-shadow:0 0 0 2px var(--c-red),0 0 0 4px var(--c-blue)}

.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:3px 8px;border:1px solid currentColor;border-radius:0;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.06em;line-height:1.6;
}
.tag--red{color:var(--c-red)}
.tag--blue{color:var(--c-blue)}
.tag--cyan{color:#0E9C90}
.tag--clay{color:var(--c-clay)}
.tag--moss{color:var(--c-moss)}
.tag--solid{background:var(--c-red);border-color:var(--c-red);color:#fff}

.data{font-family:var(--font-mono);letter-spacing:.04em;font-variant-numeric:tabular-nums}
.stat{display:block;border-top:2px solid var(--c-ink);padding-top:10px}
.stat--red{border-top-color:var(--c-red)}
.stat--blue{border-top-color:var(--c-blue)}
.stat__value{
  display:block;font-family:var(--font-mono);font-size:clamp(24px,3vw,32px);
  font-weight:700;letter-spacing:-.01em;line-height:1.2;color:inherit;
  font-variant-numeric:tabular-nums;
}
.stat__label{display:block;font-size:12px;color:var(--c-stone);margin-top:2px}
.panel--dark .stat__label,.panel--night .stat__label,.section--dark .stat__label,.section--night .stat__label{color:var(--paper-56)}

/* ---------- 7. 面包屑 ---------- */
.breadcrumb{padding:18px 0 0}
.breadcrumb__list{
  display:flex;flex-wrap:wrap;gap:8px;margin:0;padding:0;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.04em;color:var(--c-stone);
}
.breadcrumb__item{display:flex;align-items:center;gap:8px}
.breadcrumb__item + .breadcrumb__item::before{content:"/";color:var(--c-stone);opacity:.6}
.breadcrumb__link{color:var(--c-blue)}
.breadcrumb__link:hover{color:var(--c-red)}
.breadcrumb__current{color:var(--c-ink)}

/* ---------- 8. 图片容器基础（页面阶段放图用） ---------- */
.media{display:block;position:relative;border:var(--line);background:var(--c-ink);overflow:hidden}
.media__frame{
  position:relative;display:block;width:100%;aspect-ratio:16/9;min-height:180px;
  background:linear-gradient(135deg,rgba(228,50,43,.32),rgba(42,23,72,.5) 48%,rgba(27,84,214,.36));
  overflow:hidden;
}
.media--4x3 .media__frame{aspect-ratio:4/3}
.media--1x1 .media__frame{aspect-ratio:1/1}
.media__img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.media__tag{
  position:absolute;left:0;top:0;z-index:2;
  padding:5px 9px;background:var(--c-red);color:#fff;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.06em;
}
.media__caption{
  display:block;padding:10px 12px;background:var(--c-paper);border-top:var(--line);
  font-family:var(--font-mono);font-size:11px;line-height:1.7;color:var(--c-stone);
}

/* ---------- 9. 显现动效协议 ---------- */
[data-reveal]{
  opacity:0;transform:translateY(8px);
  transition:opacity .5s ease,transform .5s ease;
}
[data-reveal].is-visible{opacity:1;transform:none}

/* ---------- 10. 跳至主要内容 ---------- */
.skip-link{
  position:fixed;top:10px;left:10px;z-index:140;
  transform:translateY(-180%);
  padding:10px 16px;background:var(--c-ink);color:#fff;border:1px solid var(--c-cyan);
  font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;
  transition:transform var(--t-fast) ease;
}
.skip-link:focus{transform:translateY(0)}

/* ---------- 11. 站点头部 ---------- */
.site-header{position:sticky;top:0;z-index:90;background:var(--c-paper)}
.header-top{
  position:relative;display:flex;align-items:center;
  height:var(--rail-top-h);background:var(--c-paper);
  border-bottom:1px solid var(--ink-16);
}
.header-top__inner{
  flex:1 1 auto;min-width:0;
  display:flex;align-items:center;gap:12px;
  height:100%;padding:0 14px;
}

.brand{display:flex;align-items:center;gap:10px;flex:none;color:var(--c-ink)}
.brand__mark{
  display:flex;flex:none;width:26px;height:26px;
  border:1px solid var(--c-ink);overflow:hidden;
}
.brand__half{display:block;flex:1 1 50%;height:100%}
.brand__half--red{background:var(--c-red)}
.brand__half--blue{background:var(--c-blue)}
.brand__text{display:flex;flex-direction:column;line-height:1.2}
.brand__name{font-family:var(--font-head);font-size:17px;font-weight:800;letter-spacing:-.02em}
.brand__line{font-family:var(--font-mono);font-size:10px;letter-spacing:.06em;color:var(--c-stone)}

.season-ticker{
  display:flex;align-items:center;gap:8px;margin:0;flex:none;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.04em;color:var(--c-stone);
  white-space:nowrap;
}
.season-ticker__dot{
  flex:none;width:7px;height:7px;background:var(--c-cyan);
  animation:rb-pulse 2.6s ease-in-out infinite;
}
.season-ticker__value{color:var(--c-ink)}
.season-ticker__label{color:var(--c-stone)}
@keyframes rb-pulse{
  0%,100%{opacity:1;box-shadow:0 0 0 0 rgba(34,224,206,.45)}
  50%{opacity:.6;box-shadow:0 0 0 6px rgba(34,224,206,0)}
}

.header-actions{display:flex;align-items:center;gap:10px;margin-left:auto;flex:none}

.nav-toggle{
  flex:none;display:inline-flex;align-items:center;gap:8px;
  padding:9px 12px;background:var(--c-ink);color:var(--c-paper);border:1px solid var(--c-ink);
  font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;
  transition:background var(--t-fast) ease,color var(--t-fast) ease,border-color var(--t-fast) ease;
}
.nav-toggle:hover{background:var(--c-blue);border-color:var(--c-blue)}
.nav-toggle.is-active{background:var(--c-red);border-color:var(--c-red);color:#fff}
.nav-toggle__label{white-space:nowrap}
.nav-toggle__bars{display:flex;flex-direction:column;justify-content:center;gap:3px;width:16px}
.nav-toggle__bars i{display:block;height:2px;background:currentColor;transition:transform var(--t-fast) ease,opacity var(--t-fast) ease}
.nav-toggle__bars i:nth-child(2){width:11px}
.nav-toggle.is-active .nav-toggle__bars i:nth-child(1){transform:translateY(5px) rotate(45deg)}
.nav-toggle.is-active .nav-toggle__bars i:nth-child(2){opacity:0}
.nav-toggle.is-active .nav-toggle__bars i:nth-child(3){transform:translateY(-5px) rotate(-45deg)}

.header-top__ticks{display:none;align-items:center;gap:14px;padding-right:20px;flex:none}
.header-top__ticks span{
  display:inline-flex;align-items:center;gap:5px;
  font-family:var(--font-mono);font-size:10px;letter-spacing:.08em;color:var(--c-stone);
}
.header-top__ticks span::before{content:"";width:1px;height:12px;background:rgba(110,116,128,.6)}
.header-top__ticks span.is-current{color:var(--c-red)}
.header-top__ticks span.is-current::before{background:var(--c-red);height:16px}

.scroll-progress{
  position:absolute;left:0;right:0;bottom:-1px;height:2px;display:block;
  background:transparent;overflow:hidden;pointer-events:none;
}
.scroll-progress__fill{
  display:block;width:100%;height:100%;transform:scaleX(0);transform-origin:0 50%;
  background:linear-gradient(90deg,var(--c-red),var(--c-blue) 70%,var(--c-cyan));
  transition:transform .12s linear;
}

/* ---------- 12. 左侧竖轨导航（移动端默认折叠） ---------- */
.rail{
  position:fixed;left:0;right:0;top:var(--rail-top-h);z-index:88;
  display:none;flex-direction:column;
  max-height:calc(100vh - var(--rail-top-h));overflow-y:auto;
  padding:0 0 18px;
  background:var(--c-ink);color:var(--c-paper);
  border-bottom:3px solid var(--c-red);
}
.rail[data-open]{display:flex}
.rail__corner{display:none}
.rail__caption{
  margin:16px 0 8px;padding:0 16px;
  font-family:var(--font-mono);font-size:10px;letter-spacing:.2em;text-transform:uppercase;
  color:rgba(243,240,233,.5);
}
.rail__list{display:flex;flex-direction:column;gap:2px;margin:0;padding:0}
.rail__item{display:block}
.rail__link{
  display:flex;align-items:baseline;gap:8px;
  padding:12px;
  color:var(--c-paper);font-family:var(--font-head);font-size:14px;font-weight:700;letter-spacing:-.01em;
  border-left:3px solid transparent;
  transition:background var(--t-fast) ease,color var(--t-fast) ease,border-color var(--t-fast) ease;
}
.rail__link:hover{background:rgba(27,84,214,.92);border-left-color:var(--c-cyan)}
.rail__link[aria-current="page"]{background:var(--c-red);color:#fff;border-left-color:var(--c-cyan)}
.rail__index{
  flex:none;font-family:var(--font-mono);font-size:10px;letter-spacing:.08em;
  color:rgba(243,240,233,.55);
}
.rail__link:hover .rail__index,.rail__link[aria-current="page"] .rail__index{color:rgba(255,255,255,.85)}
.rail__label{flex:1 1 auto;min-width:0}
.rail__note{
  margin:18px 0 0;padding:14px 16px 0;
  font-family:var(--font-mono);font-size:11px;line-height:1.7;letter-spacing:.02em;
  color:rgba(243,240,233,.5);
  border-top:1px solid var(--paper-16);
}

/* ---------- 13. 站点页脚 ---------- */
.site-footer{margin-top:72px;background:var(--c-ink);color:var(--c-paper)}
.footer-band{display:flex;height:6px}
.footer-band__red{flex:0 0 62%;background:var(--c-red)}
.footer-band__blue{flex:1 1 auto;background:var(--c-blue)}

.footer-inner{
  max-width:var(--wrap);margin:0 auto;
  padding:40px 20px 24px;
  display:grid;grid-template-columns:1fr;gap:28px;
}

.footer-brand__mark{display:flex;width:34px;height:34px;border:1px solid rgba(243,240,233,.35);margin-bottom:14px;overflow:hidden}
.footer-brand__name{font-family:var(--font-head);font-size:22px;font-weight:800;letter-spacing:-.02em;color:#fff;margin:0 0 6px;line-height:1.2}
.footer-brand__line{font-family:var(--font-mono);font-size:11px;letter-spacing:.06em;color:rgba(243,240,233,.55);margin:0 0 16px}
.footer-season{
  display:flex;align-items:flex-start;gap:8px;margin:0;max-width:26em;
  font-family:var(--font-mono);font-size:11px;line-height:1.75;letter-spacing:.02em;
  color:rgba(243,240,233,.72);
}
.footer-season__dot{flex:none;width:7px;height:7px;margin-top:6px;background:var(--c-cyan)}

.footer-cols{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:26px 20px}
.footer-col{min-width:0}
.footer-col__title{
  margin:0 0 12px;font-family:var(--font-mono);font-size:10px;letter-spacing:.2em;
  text-transform:uppercase;color:var(--c-cyan);
}
.footer-col__list{display:grid;gap:9px;margin:0;padding:0}
.footer-col__link{
  display:inline-block;font-size:14px;color:rgba(243,240,233,.86);
  border-bottom:1px solid transparent;
  transition:color var(--t-fast) ease,border-color var(--t-fast) ease;
}
.footer-col__link:hover,.footer-col__link:focus-visible{color:#fff;border-bottom-color:var(--c-red)}

.footer-contact{display:grid;gap:10px;align-content:start}
.footer-contact__item{display:grid;gap:2px;margin:0}
.footer-contact__label{font-family:var(--font-mono);font-size:10px;letter-spacing:.14em;color:rgba(243,240,233,.5)}
.footer-contact__value{font-size:14px;color:#fff;word-break:break-word}
.footer-contact__note{margin:6px 0 0;font-size:12px;line-height:1.75;color:rgba(243,240,233,.55);max-width:28em}

.footer-meta{
  grid-column:1/-1;display:flex;flex-wrap:wrap;align-items:center;gap:10px 24px;
  padding-top:18px;border-top:1px solid var(--paper-16);
  font-family:var(--font-mono);font-size:11px;letter-spacing:.04em;color:rgba(243,240,233,.55);
}
.footer-meta__copy,.footer-meta__icp{margin:0}
.footer-legal{display:flex;flex-wrap:wrap;gap:16px;margin:0;padding:0}
.footer-legal__link{color:rgba(243,240,233,.72);transition:color var(--t-fast) ease}
.footer-legal__link:hover,.footer-legal__link:focus-visible{color:var(--c-cyan)}

/* ---------- 14. 平板 ---------- */
@media (min-width:768px){
  .wrap{padding:0 28px}
  .section{padding:64px 0}
  .footer-inner{grid-template-columns:1fr 1fr;gap:32px 40px;padding:48px 28px 26px}
  .footer-brand{grid-column:1/-1}
}

/* ---------- 15. 桌面：双轨围框 ---------- */
@media (min-width:1024px){
  body{padding-left:var(--rail-w);padding-top:var(--rail-top-h)}
  .site-header{position:static;height:0;background:transparent}
  .header-top{
    position:fixed;top:0;left:var(--rail-w);right:0;z-index:80;
    height:var(--rail-top-h);border-left:1px solid var(--ink-16);
  }
  .header-top__inner{padding:0 18px 0 22px;gap:18px}
  .nav-toggle{display:none}
  .rail{
    display:flex;position:fixed;top:0;left:0;right:auto;bottom:0;z-index:82;
    width:var(--rail-w);max-height:none;overflow-y:auto;overflow-x:hidden;
    padding:0 0 14px;
    border-bottom:0;border-right:1px solid rgba(243,240,233,.14);
  }
  .rail__corner{display:flex;flex:none;height:var(--rail-top-h);border-bottom:1px solid rgba(243,240,233,.18)}
  .rail__corner i{display:block;flex:1 1 50%}
  .rail__corner i:first-child{background:var(--c-red)}
  .rail__corner i:last-child{background:var(--c-blue)}
  .rail__caption{margin:18px 0 8px;padding:0 12px}
  .rail__note{margin-top:auto;padding:14px 12px 0}
  .rail__link{padding:11px 12px;font-size:14px}
  .grid--split{grid-template-columns:7fr 5fr}
  .footer-inner{grid-template-columns:1fr 1.7fr 1.2fr;padding:52px 40px 28px;gap:40px}
  .footer-brand{grid-column:auto}
  .footer-legal{margin-left:auto}
}

/* ---------- 16. 宽屏：比赛周刻度 ---------- */
@media (min-width:1200px){
  .header-top__ticks{display:flex}
}

/* ---------- 17. 响应式收束 ---------- */
@media (max-width:899px){
  .season-ticker__label{display:none}
}
@media (max-width:719px){
  .header-actions .btn--line{display:none}
}
@media (max-width:639px){
  body{font-size:16px}
  .brand__line{display:none}
  .season-ticker__year{display:none}
  .nav-toggle__label{display:none}
  .nav-toggle{padding:10px}
  .section{padding:44px 0}
  .rail__link{padding:14px 16px;font-size:15px}
}
@media (max-width:479px){
  .season-ticker{display:none}
  .header-actions .btn{padding:9px 12px;font-size:13px}
}

/* ---------- 18. 焦点与减弱动效 ---------- */
:focus-visible{outline:2px solid var(--c-cyan);outline-offset:2px}
.rail__link:focus-visible{outline:2px solid var(--c-cyan);outline-offset:-3px}
.footer-col__link:focus-visible,.footer-legal__link:focus-visible{outline-offset:3px}
.btn:focus-visible{outline-offset:2px}
.nav-toggle:focus-visible{outline:2px solid var(--c-cyan);outline-offset:2px}

@media (prefers-reduced-motion: no-preference){
  html{scroll-behavior:smooth}
}
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .season-ticker__dot{animation:none}
  .scroll-progress__fill{transition:none}
  [data-reveal]{opacity:1;transform:none}
}