/* ============================================================
   米乐体育 · M6 赛历 — /assets/site.css
   共享外壳：命令栏、页脚、通用组件、排版与响应式
   ============================================================ */

/* ---------- 1. 设计令牌 ---------- */
:root{
  --ink-0:#071018;
  --ink-1:#0C1A26;
  --ink-2:#16324A;
  --frost:#E8F1F6;
  --signal:#FF6A1A;
  --venue:#2FBF8F;
  --amber:#F2B233;
  --paper:#F4F1EA;
  --ink-dark:#111417;
  --rule:#3D5A73;
  --white:#FFFFFF;
  --on-signal:#0A0F14;

  --font-display:"Barlow Condensed","Oswald","Arial Narrow",system-ui,sans-serif;
  --font-head:"Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --font-body:"Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --font-mono:"IBM Plex Mono","JetBrains Mono",ui-monospace,SFMono-Regular,Consolas,monospace;

  --shell:1280px;
  --gutter:clamp(16px,3vw,40px);
  --header-h:56px;
  --ease:150ms ease;
}

/* ---------- 2. Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;min-height:100vh;
  background:var(--ink-0);
  color:var(--frost);
  font-family:var(--font-body);
  font-size:1rem;font-weight:400;line-height:1.7;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img,svg,video{display:block;max-width:100%;height:auto}
h1,h2,h3,h4,p,figure,blockquote,dl,dd{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;margin:0;padding:0;cursor:pointer}
table{border-collapse:collapse;width:100%}
::selection{background:var(--signal);color:var(--on-signal)}

/* ---------- 3. 中文排版 ---------- */
h1,h2,h3,h4{
  font-family:var(--font-head);
  font-weight:900;
  line-height:1.16;
  letter-spacing:-.02em;
  color:var(--white);
}
h1{font-size:clamp(2rem,3.4vw,3.2rem)}
h2{font-size:clamp(1.35rem,2vw,1.8rem)}
h3{font-size:1.1rem}
p{color:rgba(232,241,246,.82)}
strong{font-weight:800;color:var(--white)}
.mono{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  letter-spacing:.04em;
}
.eyebrow{
  display:inline-flex;align-items:center;gap:.5rem;
  font-family:var(--font-mono);font-size:.72rem;font-weight:600;
  letter-spacing:.18em;text-transform:uppercase;
  color:var(--venue);
}
.eyebrow::before{content:"";width:18px;height:1px;background:currentColor}
.rule{height:1px;border:0;background:var(--rule);margin:0}
.rule--dashed{background:none;border-top:1px dashed var(--rule)}

/* ---------- 4. 布局容器 ---------- */
.shell{width:100%;max-width:var(--shell);margin-inline:auto;padding-inline:var(--gutter)}
.page-main{padding-block:clamp(1.8rem,4vw,3.4rem)}
.grid{display:grid;gap:clamp(16px,2.4vw,32px)}
.grid--sidebar{grid-template-columns:minmax(0,1fr)}
.grid--halves{grid-template-columns:repeat(auto-fit,minmax(260px,1fr))}
.grid--thirds{grid-template-columns:repeat(auto-fit,minmax(220px,1fr))}
@media (min-width:1024px){
  .grid--sidebar{grid-template-columns:280px minmax(0,1fr);gap:clamp(24px,3vw,48px);align-items:start}
}

/* ---------- 5. 跳转链接 ---------- */
.skip-link{
  position:absolute;left:12px;top:-80px;z-index:300;
  padding:.6rem .95rem;
  background:var(--signal);color:var(--on-signal);
  font-family:var(--font-head);font-weight:800;font-size:.85rem;
  transition:top var(--ease);
}
.skip-link:focus{top:8px}

/* ---------- 6. 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.45rem;
  padding:.5rem .85rem;
  border:1px solid var(--rule);
  background:var(--ink-1);color:var(--frost);
  font-family:var(--font-head);font-weight:800;font-size:.8rem;
  letter-spacing:.02em;line-height:1.2;white-space:nowrap;
  transition:transform var(--ease),box-shadow var(--ease),
             background-color var(--ease),border-color var(--ease),color var(--ease);
}
.btn:hover,.btn:focus-visible{transform:translate(-2px,-2px);box-shadow:3px 3px 0 rgba(61,90,115,.9)}
.btn:active{transform:translate(0,0);box-shadow:none}
.btn--signal{background:var(--signal);border-color:var(--signal);color:var(--on-signal)}
.btn--signal:hover,.btn--signal:focus-visible{box-shadow:3px 3px 0 rgba(255,106,26,.35)}
.btn--ghost{background:transparent;border-color:var(--rule);color:var(--frost)}
.btn--ghost:hover,.btn--ghost:focus-visible{background:var(--ink-1);color:var(--white)}
.btn--paper{background:var(--paper);border-color:var(--ink-dark);color:var(--ink-dark)}
.btn--block{width:100%}

/* ---------- 7. 标签 ---------- */
.tag{
  display:inline-flex;align-items:center;gap:.375rem;
  padding:.2rem .5rem;
  border:1px solid var(--rule);
  background:rgba(12,26,38,.72);
  color:var(--frost);
  font-family:var(--font-mono);font-size:.72rem;font-weight:600;
  letter-spacing:.06em;line-height:1.5;white-space:nowrap;
}
.tag--signal{border-color:var(--signal);color:var(--signal);background:rgba(255,106,26,.1)}
.tag--venue{border-color:var(--venue);color:var(--venue);background:rgba(47,191,143,.1)}
.tag--amber{border-color:var(--amber);color:var(--amber);background:rgba(242,178,51,.1)}
.tag--paper{border-color:var(--ink-dark);color:var(--ink-dark);background:var(--paper)}

/* ---------- 8. 命令栏 ---------- */
.site-header{
  position:sticky;top:0;z-index:100;
  background:rgba(7,16,24,.94);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--rule);
  color:var(--frost);
}
.header-rail{height:3px;background:var(--ink-2);overflow:hidden}
.header-rail__fill{
  display:block;height:100%;width:100%;
  background:linear-gradient(90deg,var(--venue),var(--signal));
  transform:scaleX(0);transform-origin:0 50%;
  transition:transform 180ms linear;
}
.header-inner{
  display:grid;
  grid-template-columns:auto minmax(0,1fr) auto;
  align-items:center;
  gap:clamp(10px,2vw,28px);
  width:100%;max-width:var(--shell);
  margin-inline:auto;
  padding-inline:var(--gutter);
  min-height:var(--header-h);
}

/* 品牌索引章 */
.brand{display:inline-flex;align-items:center;gap:.6rem;grid-column:1;flex:0 0 auto}
.brand__mark{
  display:grid;place-items:center;
  width:34px;height:34px;
  background:var(--signal);color:var(--on-signal);
  font-family:var(--font-display);font-weight:800;font-size:1rem;
  letter-spacing:-.02em;line-height:1;
  clip-path:polygon(0 0,100% 0,100% 72%,72% 100%,0 100%);
}
.brand__text{display:flex;flex-direction:column;line-height:1.15}
.brand__name{font-family:var(--font-head);font-weight:900;font-size:.95rem;letter-spacing:.02em;color:var(--white)}
.brand__sub{
  font-family:var(--font-mono);font-size:.6rem;font-weight:500;
  letter-spacing:.14em;text-transform:uppercase;
  color:rgba(232,241,246,.55);
}
.brand--footer .brand__mark{width:40px;height:40px;font-size:1.15rem}
.brand--footer .brand__name{font-size:1.05rem}
.brand--footer .brand__sub{letter-spacing:.12em}

/* 栏目命令 */
.nav{grid-column:2;justify-self:center;min-width:0}
.nav__list{display:flex;align-items:center;gap:2px}
.nav__link{
  position:relative;
  display:inline-flex;align-items:baseline;gap:.35rem;
  padding:.45rem .55rem;
  border:1px solid transparent;
  color:rgba(232,241,246,.72);
  transition:color var(--ease),background-color var(--ease),border-color var(--ease);
}
.nav__idx{
  font-family:var(--font-mono);font-size:.58rem;font-weight:600;
  letter-spacing:.08em;color:var(--rule);
  transition:color var(--ease);
}
.nav__label{
  font-family:var(--font-head);font-weight:700;font-size:.82rem;
  letter-spacing:.01em;white-space:nowrap;
}
.nav__link:hover,.nav__link:focus-visible{
  color:var(--white);background:var(--ink-1);border-color:var(--rule);
}
.nav__link:hover .nav__idx,.nav__link:focus-visible .nav__idx{color:var(--signal)}
.nav__link[aria-current="page"]{
  color:var(--white);
  border-color:var(--rule);
  background:linear-gradient(180deg,rgba(255,106,26,.16),rgba(255,106,26,0));
}
.nav__link[aria-current="page"] .nav__idx{color:var(--signal)}
.nav__link[aria-current="page"]::after{
  content:"";position:absolute;left:4px;right:4px;bottom:-1px;
  height:2px;background:var(--signal);
}
.nav__foot{display:none}
.nav__foot-line{
  display:flex;align-items:center;gap:.45rem;
  font-family:var(--font-mono);font-size:.68rem;letter-spacing:.1em;
  color:rgba(232,241,246,.6);
}

/* 右侧状态与入口 */
.header-actions{
  grid-column:3;justify-self:end;
  display:flex;align-items:center;gap:.5rem;
}
.header-status{
  display:inline-flex;align-items:center;gap:.4rem;
  font-family:var(--font-mono);font-size:.66rem;font-weight:500;
  letter-spacing:.1em;white-space:nowrap;
  color:rgba(232,241,246,.6);
}
.header-status__dot{
  width:6px;height:6px;flex:0 0 auto;
  background:var(--venue);border-radius:50%;
  box-shadow:0 0 0 3px rgba(47,191,143,.18);
  animation:pulse 2.4s ease-in-out infinite;
}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.35}}

/* 移动开关 */
.nav-toggle{
  display:none;
  align-items:center;gap:.5rem;
  padding:.5rem .6rem;
  border:1px solid var(--rule);
  background:var(--ink-1);color:var(--frost);
  transition:border-color var(--ease),color var(--ease);
}
.nav-toggle__bars{display:grid;gap:4px;width:16px}
.nav-toggle__bars span{
  display:block;height:2px;background:currentColor;
  transition:transform 200ms ease,opacity 200ms ease;
}
.nav-toggle__text{
  font-family:var(--font-mono);font-size:.68rem;font-weight:600;
  letter-spacing:.12em;
}
.site-header[data-open="true"] .nav-toggle{border-color:var(--signal);color:var(--signal)}
.site-header[data-open="true"] .nav-toggle__bars span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.site-header[data-open="true"] .nav-toggle__bars span:nth-child(2){opacity:0}
.site-header[data-open="true"] .nav-toggle__bars span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

@media (max-width:1180px){
  .header-status{display:none}
}
@media (min-width:1024px) and (max-width:1180px){
  .nav__label{font-size:.76rem}
  .nav__link{padding:.4rem .45rem}
  .btn{font-size:.75rem;padding:.45rem .7rem}
}

/* ---------- 9. 移动导航 ---------- */
@media (max-width:1023px){
  .header-inner{grid-template-columns:minmax(0,1fr) auto;min-height:var(--header-h)}
  .nav-toggle{display:inline-flex;grid-column:2;justify-self:end}
  .header-actions{display:none}
  .nav{
    position:absolute;left:0;right:0;top:100%;
    display:none;grid-column:1 / -1;justify-self:stretch;
    background:var(--ink-1);
    border-top:1px solid var(--rule);
    border-bottom:1px solid var(--rule);
    box-shadow:0 18px 40px rgba(0,0,0,.45);
    padding:.5rem var(--gutter) 1.1rem;
    max-height:calc(100vh - 60px);
    overflow-y:auto;
  }
  .site-header[data-open="true"] .nav{display:block}
  .nav__list{flex-direction:column;align-items:stretch;gap:0}
  .nav__link{
    justify-content:flex-start;
    gap:.6rem;
    padding:.78rem .5rem;
    border-bottom:1px solid rgba(61,90,115,.4);
  }
  .nav__label{font-size:.95rem}
  .nav__idx{font-size:.66rem}
  .nav__link[aria-current="page"]::after{
    left:0;right:auto;top:.6rem;bottom:.6rem;
    width:3px;height:auto;
  }
  .nav__foot{display:grid;gap:.5rem;padding-top:.95rem}
}

/* ---------- 10. 页脚 ---------- */
.site-footer{
  margin-top:clamp(3rem,6vw,5rem);
  background:var(--ink-0);
  border-top:1px solid var(--rule);
  color:var(--frost);
}
.site-footer::before{
  content:"";display:block;height:6px;
  background:repeating-linear-gradient(90deg,var(--rule) 0 1px,transparent 1px 12px);
  opacity:.7;
}
.footer-top{
  display:grid;
  grid-template-columns:minmax(0,1.1fr) minmax(0,2fr);
  gap:clamp(24px,4vw,64px);
  padding-block:clamp(2.2rem,5vw,3.6rem);
}
.footer-brand{display:flex;flex-direction:column;align-items:flex-start;gap:.9rem;max-width:40ch}
.footer-summary{font-size:.92rem;line-height:1.75;color:rgba(232,241,246,.7)}
.footer-cols{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:clamp(16px,3vw,40px);
}
.footer-col__title{
  font-family:var(--font-mono);font-size:.68rem;font-weight:600;
  letter-spacing:.2em;text-transform:uppercase;
  color:var(--rule);margin-bottom:.8rem;
}
.footer-col__list{display:grid;gap:.5rem}
.footer-link{
  display:inline-flex;align-items:center;gap:.45rem;
  font-size:.9rem;color:rgba(232,241,246,.78);
  transition:color var(--ease),transform var(--ease);
}
.footer-link::before{
  content:"";width:6px;height:1px;background:var(--rule);
  transition:width var(--ease),background-color var(--ease);
}
.footer-link:hover,.footer-link:focus-visible{color:var(--white);transform:translateX(2px)}
.footer-link:hover::before,.footer-link:focus-visible::before{width:12px;background:var(--signal)}

.footer-contact{
  display:grid;grid-template-columns:auto minmax(0,1fr);
  gap:clamp(12px,2vw,32px);align-items:start;
  padding-block:1.15rem;
  border-top:1px solid var(--rule);
  border-bottom:1px solid var(--rule);
}
.footer-contact__label{
  font-family:var(--font-mono);font-size:.66rem;font-weight:600;
  letter-spacing:.2em;text-transform:uppercase;
  color:var(--signal);padding-top:.2rem;
}
.footer-contact__list{
  display:flex;flex-wrap:wrap;gap:.45rem 1.8rem;
  font-family:var(--font-mono);font-size:.78rem;
  letter-spacing:.02em;color:rgba(232,241,246,.78);
}
.footer-contact__item{display:inline-flex;align-items:baseline;gap:.45rem}
.footer-contact__item span{
  font-size:.66rem;letter-spacing:.14em;text-transform:uppercase;
  color:var(--rule);
}

.footer-legal{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:.6rem 1.5rem;
  padding-block:1.4rem;
  font-size:.76rem;color:rgba(232,241,246,.55);
}
.footer-legal__meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:.4rem 1.1rem;
  font-family:var(--font-mono);font-size:.72rem;letter-spacing:.06em;
}
.footer-legal__links{display:flex;flex-wrap:wrap;gap:.4rem 1.1rem}
.footer-legal__links a{
  color:rgba(232,241,246,.62);
  border-bottom:1px solid transparent;
  transition:color var(--ease),border-color var(--ease);
}
.footer-legal__links a:hover,.footer-legal__links a:focus-visible{
  color:var(--white);border-bottom-color:var(--signal);
}
.footer-copy{font-family:var(--font-mono);font-size:.72rem;letter-spacing:.05em}

@media (max-width:900px){
  .footer-top{grid-template-columns:minmax(0,1fr)}
  .footer-brand{max-width:none}
}
@media (max-width:620px){
  .footer-cols{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-contact{grid-template-columns:minmax(0,1fr)}
  .footer-legal{flex-direction:column;align-items:flex-start}
}

/* ---------- 11. 面包屑 ---------- */
.breadcrumb{margin-bottom:clamp(1rem,2vw,1.6rem)}
.breadcrumb__list{
  display:flex;flex-wrap:wrap;align-items:center;gap:.4rem;
  font-family:var(--font-mono);font-size:.7rem;font-weight:500;
  letter-spacing:.1em;text-transform:uppercase;
  color:var(--rule);
}
.breadcrumb__list a{color:rgba(232,241,246,.7);transition:color var(--ease)}
.breadcrumb__list a:hover,.breadcrumb__list a:focus-visible{color:var(--signal)}
.breadcrumb__sep{color:var(--rule)}
.breadcrumb__current{color:var(--frost)}

/* ---------- 12. 章节开篇 ---------- */
.section-head{
  display:grid;grid-template-columns:auto minmax(0,1fr);
  gap:clamp(12px,2vw,28px);align-items:end;
  padding-bottom:.9rem;margin-bottom:clamp(1.2rem,2.5vw,2rem);
  border-bottom:1px solid var(--rule);
}
.chapter-num{
  font-family:var(--font-display);font-weight:800;
  font-size:clamp(3.2rem,8vw,7.5rem);
  line-height:.78;letter-spacing:-.02em;
  color:var(--rule);
}
@supports (-webkit-text-stroke:1px red){
  .chapter-num{color:transparent;-webkit-text-stroke:1px var(--rule)}
  .chapter-num.is-active{color:var(--signal);-webkit-text-stroke-color:var(--signal)}
}

/* ---------- 13. 面板与档案卡 ---------- */
.panel{
  background:var(--ink-1);
  border:1px solid var(--rule);
  padding:clamp(1rem,2vw,1.5rem);
}
.panel--paper{background:var(--paper);border-color:var(--ink-dark);color:var(--ink-dark)}
.panel--paper h2,.panel--paper h3,.panel--paper h4{color:var(--ink-dark)}
.panel--paper p{color:rgba(17,20,23,.82)}

/* 可展开资料卡 */
.dossier{
  background:var(--paper);color:var(--ink-dark);
  border:1px solid var(--ink-dark);
  box-shadow:6px 6px 0 rgba(61,90,115,.35);
  transition:transform 200ms ease,box-shadow 200ms ease;
}
.dossier:hover{transform:translate(-1px,-1px);box-shadow:8px 8px 0 rgba(61,90,115,.4)}
.dossier__trigger{
  display:flex;width:100%;align-items:center;justify-content:space-between;gap:1rem;
  padding:.9rem 1.1rem;text-align:left;
  font-family:var(--font-head);font-weight:800;font-size:.98rem;
  color:var(--ink-dark);
  border-bottom:1px solid rgba(17,20,23,.16);
  transition:background-color var(--ease);
}
.dossier__trigger:hover{background:rgba(17,20,23,.05)}
.dossier__sign{
  position:relative;flex:0 0 auto;width:18px;height:18px;
  border:1px solid var(--ink-dark);
  transition:background-color 200ms ease,border-color 200ms ease;
}
.dossier__sign::before,.dossier__sign::after{
  content:"";position:absolute;left:3px;right:3px;top:50%;
  height:1.5px;background:var(--ink-dark);
  transform:translateY(-50%);
}
.dossier__sign::after{transform:translateY(-50%) rotate(90deg);transition:transform 200ms ease}
.dossier[data-open] .dossier__sign{background:var(--signal);border-color:var(--signal)}
.dossier[data-open] .dossier__sign::before,
.dossier[data-open] .dossier__sign::after{background:var(--on-signal)}
.dossier[data-open] .dossier__sign::after{transform:translateY(-50%) rotate(0)}
.dossier__panel{
  display:grid;grid-template-rows:0fr;
  visibility:hidden;
  transition:grid-template-rows 240ms ease,visibility 240ms;
}
.dossier[data-open] .dossier__panel{grid-template-rows:1fr;visibility:visible}
.dossier__body{overflow:hidden;font-size:.92rem;line-height:1.72;color:rgba(17,20,23,.82)}
.dossier__body > *{margin:0;padding:0 1.1rem}
.dossier__body > *:first-child{padding-top:.9rem}
.dossier__body > *:last-child{padding-bottom:1.1rem}

/* ---------- 14. 数字与图片容器 ---------- */
.stat{display:grid;gap:.15rem;padding-left:.75rem;border-left:2px solid var(--signal)}
.stat__num{
  font-family:var(--font-display);font-weight:800;
  font-size:clamp(1.8rem,4vw,2.8rem);line-height:1;
  color:var(--white);font-variant-numeric:tabular-nums;
}
.stat__label{
  font-family:var(--font-mono);font-size:.66rem;font-weight:600;
  letter-spacing:.14em;text-transform:uppercase;color:var(--rule);
}

.img-frame{
  position:relative;overflow:hidden;
  border:1px solid var(--rule);
  background:linear-gradient(160deg,var(--ink-2),var(--ink-0));
  aspect-ratio:16/9;
}
.img-frame img{width:100%;height:100%;object-fit:cover}
.img-frame::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:repeating-linear-gradient(0deg,rgba(232,241,246,.05) 0 1px,transparent 1px 4px);
  mix-blend-mode:screen;
}
.img-frame--wide{aspect-ratio:21/9}
.img-frame--portrait{aspect-ratio:4/5}
.img-frame--square{aspect-ratio:1/1}
.img-frame__tag{
  position:absolute;left:-1px;top:.9rem;z-index:2;
  display:inline-flex;align-items:center;gap:.35rem;
  padding:.2rem .6rem;
  background:var(--signal);color:var(--on-signal);
  font-family:var(--font-mono);font-size:.7rem;font-weight:600;letter-spacing:.08em;
}
@media (max-width:620px){
  .img-frame--wide{aspect-ratio:16/10}
}

/* ---------- 15. 焦点与动效偏好 ---------- */
:focus-visible{outline:2px solid var(--signal);outline-offset:3px}
@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;
  }
  .btn:hover,.btn:focus-visible,
  .dossier:hover,
  .footer-link:hover,.footer-link:focus-visible{transform:none}
}